# High cpu load but low memory usage **URL:** \ **Category:** Elasticsearch\ **Created:** [October 24, 2014, 8:43am UTC](https://discuss.elastic.co/t/high-cpu-load-but-low-memory-usage/20417 "2014-10-24T08:43:21Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![Atrus](https://avatars.discourse-cdn.com/v4/letter/a/67e7ee/32.png) [@Atrus](https://discuss.elastic.co/u/Atrus)\ **Post date:** [October 24, 2014, 8:43am UTC](https://discuss.elastic.co/t/high-cpu-load-but-low-memory-usage/20417/1 "2014-10-24T08:43:21Z")
Hi Pros, I've used ES for several months, it works perfectly and speed as lightning. There are 3 nodes in cluster, each have 12cores CPU and 24GB-32GB RAM. [https://lh3.googleusercontent.com/-\_uMqos5lNrA/VEoN2IA030I/AAAAAAAAE7Q/P-dzKwCA5Uo/s1600/es1.png](https://lh3.googleusercontent.com/-_uMqos5lNrA/VEoN2IA030I/AAAAAAAAE7Q/P-dzKwCA5Uo/s1600/es1.png) For some recent days, the cpu get too high on all three nodes. [https://lh4.googleusercontent.com/-vZ2nh9KaL5I/VEoOdnnLnpI/AAAAAAAAE7Y/hhKD9quUW04/s1600/es3.png](https://lh4.googleusercontent.com/-vZ2nh9KaL5I/VEoOdnnLnpI/AAAAAAAAE7Y/hhKD9quUW04/s1600/es3.png) Here is some sample record : [https://lh4.googleusercontent.com/-CB5yFYk54i4/VEoOzF4RnDI/AAAAAAAAE7g/-Ko82c2hiC8/s1600/es4.png](https://lh4.googleusercontent.com/-CB5yFYk54i4/VEoOzF4RnDI/AAAAAAAAE7g/-Ko82c2hiC8/s1600/es4.png) The question is : - Why the cpu get too high but memory consume is low althougt I have set the big HEAP size. - There is 15 shards per index, is this too much or enough ? I've used the default config. I know that this could be effect the load but dont know how to figure out the exact number. - Is there any way to show the running queries ? something like mysql show process list ? to show what queries have eat CPU alot. I have enable slow log queries \>1s but found nothing. - Any suggestion is appreciate. If you need more info, plz tell me. Thank you so much. -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/11addd59-1138-4f62-bac2-3e95030f5631%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/11addd59-1138-4f62-bac2-3e95030f5631%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Atrus](https://avatars.discourse-cdn.com/v4/letter/a/67e7ee/32.png) [@Atrus](https://discuss.elastic.co/u/Atrus)\ **Post date:** [October 25, 2014, 1:35am UTC](https://discuss.elastic.co/t/high-cpu-load-but-low-memory-usage/20417/2 "2014-10-25T01:35:22Z")
Dear Kimchy, Plz suggest me what the problem could be ? Thank you so much ! Atrus. -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/73133190-0172-4c61-99b0-a886a2cd5cc0%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/73133190-0172-4c61-99b0-a886a2cd5cc0%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![jprante](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jprante/32/44941_2.png) [@jprante](https://discuss.elastic.co/u/jprante)\ **Post date:** [October 25, 2014, 12:43pm UTC](https://discuss.elastic.co/t/high-cpu-load-but-low-memory-usage/20417/3 "2014-10-25T12:43:16Z")
Please post the result of "hot threads" action on a gist/paste page so we can understand your problem better. > **[Elasticsearch Platform — Find real-time answers at scale](https://www.elastic.co)** > > Power insights and outcomes with the Elasticsearch Platform and AI. See into your data and find answers that matter with enterprise solutions designed to help you build, observe, and protect. Try Elasticsearch free today. Jörg On Fri, Oct 24, 2014 at 10:43 AM, Atrus [anhhuyla@gmail.com](mailto:anhhuyla@gmail.com) wrote: > Hi Pros, > > I've used ES for several months, it works perfectly and speed as lightning. > > There are 3 nodes in cluster, each have 12cores CPU and 24GB-32GB RAM. > > [https://lh3.googleusercontent.com/-\_uMqos5lNrA/VEoN2IA030I/AAAAAAAAE7Q/P-dzKwCA5Uo/s1600/es1.png](https://lh3.googleusercontent.com/-_uMqos5lNrA/VEoN2IA030I/AAAAAAAAE7Q/P-dzKwCA5Uo/s1600/es1.png) > > For some recent days, the cpu get too high on all three nodes. > > [https://lh4.googleusercontent.com/-vZ2nh9KaL5I/VEoOdnnLnpI/AAAAAAAAE7Y/hhKD9quUW04/s1600/es3.png](https://lh4.googleusercontent.com/-vZ2nh9KaL5I/VEoOdnnLnpI/AAAAAAAAE7Y/hhKD9quUW04/s1600/es3.png) > > Here is some sample record : > > [https://lh4.googleusercontent.com/-CB5yFYk54i4/VEoOzF4RnDI/AAAAAAAAE7g/-Ko82c2hiC8/s1600/es4.png](https://lh4.googleusercontent.com/-CB5yFYk54i4/VEoOzF4RnDI/AAAAAAAAE7g/-Ko82c2hiC8/s1600/es4.png) > > The question is : > > - Why the cpu get too high but memory consume is low althougt I have set > the big HEAP size. > > - There is 15 shards per index, is this too much or enough ? I've used the > default config. I know that this could be effect the load but dont know how > to figure out the exact number. > > - Is there any way to show the running queries ? something like mysql show > process list ? to show what queries have eat CPU alot. I have enable slow > log queries \>1s but found nothing. > > - Any suggestion is appreciate. > > If you need more info, plz tell me. > > Thank you so much. > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > To view this discussion on the web visit > [https://groups.google.com/d/msgid/elasticsearch/11addd59-1138-4f62-bac2-3e95030f5631%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/11addd59-1138-4f62-bac2-3e95030f5631%40googlegroups.com) > [https://groups.google.com/d/msgid/elasticsearch/11addd59-1138-4f62-bac2-3e95030f5631%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/11addd59-1138-4f62-bac2-3e95030f5631%40googlegroups.com?utm_medium=email&utm_source=footer) > . > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoEepovw3E\_B%2B3vGSB%2B9nB-%2B2-RrQMVYPJRmp1PKpjkHdQ%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoEepovw3E_B%2B3vGSB%2B9nB-%2B2-RrQMVYPJRmp1PKpjkHdQ%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Mathieu\_Lecarme](https://avatars.discourse-cdn.com/v4/letter/m/eb8c5e/32.png) [@Mathieu\_Lecarme](https://discuss.elastic.co/u/Mathieu_Lecarme)\ **Post date:** [October 25, 2014, 5:57pm UTC](https://discuss.elastic.co/t/high-cpu-load-but-low-memory-usage/20417/4 "2014-10-25T17:57:40Z")
Le vendredi 24 octobre 2014 10:43:21 UTC+2, Atrus a écrit : > - There is 15 shards per index, is this too much or enough ? I've used the > default config. I know that this could be effect the load but dont know how > to figure out the exact number. > > It's a huge value. Shards can be split between nodes, do you target tu use > 15 nodes? > - Is there any way to show the running queries ? something like mysql show > process list ? to show what queries have eat CPU alot. I have enable slow > log queries \>1s but found nothing. You can watch HTTP traffic, with pcap (I hack packetbeat, for that). It's from the outside, from the inside, use the hot thread. strace can help, too. > - Any suggestion is appreciate. Do you poll the \_nodes/stat url? a monitoring tool, or a web page like kopf? -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/3fbc22df-c8d8-4472-8a1a-db90a130d795%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/3fbc22df-c8d8-4472-8a1a-db90a130d795%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Atrus](https://avatars.discourse-cdn.com/v4/letter/a/67e7ee/32.png) [@Atrus](https://discuss.elastic.co/u/Atrus)\ **Post date:** [October 26, 2014, 2:44am UTC](https://discuss.elastic.co/t/high-cpu-load-but-low-memory-usage/20417/5 "2014-10-26T02:44:44Z")
Thanks Mathieu for you response. I will try your suggestions. "It's a huge value. Shards can be split between nodes, do you target tu use 15 nodes?" Hi Mat, - For examples if I have just one node, shards = 5, replica = 0. Then I can easily backup the data by "cp /var/lib/elasticsearch/nodename /somewhere/backup -rfp" - Now I add one more node, so the cluster has two nodes, shards = 5, replica = 0. The shards are redistributed, maybe 1st node holds 0 2 4, 2nd node holds 1 3. =\> How can I backup, each node does not hold the whole data, can not simple cp ... - If I update replicas = 1, each node now have full 5 shards, I can easy cp backup on any node. If you know the better way for backup which can handle distributed shards, plz let me know. Thank you. PS : Can I reduce shards from 5 to 4 without losing data ? On Sunday, October 26, 2014 12:57:40 AM UTC+7, Mathieu Lecarme wrote: > Le vendredi 24 octobre 2014 10:43:21 UTC+2, Atrus a écrit : > > > - There is 15 shards per index, is this too much or enough ? I've used > > the default config. I know that this could be effect the load but dont know > > how to figure out the exact number. > > > > It's a huge value. Shards can be split between nodes, do you target tu > > use 15 nodes? > > > - Is there any way to show the running queries ? something like mysql > > show process list ? to show what queries have eat CPU alot. I have enable > > slow log queries \>1s but found nothing. > > You can watch HTTP traffic, with pcap (I hack packetbeat, for that). It's > from the outside, from the inside, use the hot thread. strace can help, too. > > > - Any suggestion is appreciate. > > Do you poll the \_nodes/stat url? a monitoring tool, or a web page like > kopf? -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/4ab77f45-177d-4546-b953-5f38c7f4f5d1%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/4ab77f45-177d-4546-b953-5f38c7f4f5d1%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![jprante](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jprante/32/44941_2.png) [@jprante](https://discuss.elastic.co/u/jprante)\ **Post date:** [October 26, 2014, 10:08am UTC](https://discuss.elastic.co/t/high-cpu-load-but-low-memory-usage/20417/6 "2014-10-26T10:08:22Z")
For backup/restore, do not use cp. There is snapshot/restore for that. It works on primary shards only. > **[Elasticsearch Platform — Find real-time answers at scale](https://www.elastic.co)** > > Power insights and outcomes with the Elasticsearch Platform and AI. See into your data and find answers that matter with enterprise solutions designed to help you build, observe, and protect. Try Elasticsearch free today. You can not reduce shards in an existing index. Use export/import tools and create new index. Jörg On Sun, Oct 26, 2014 at 3:44 AM, Atrus [anhhuyla@gmail.com](mailto:anhhuyla@gmail.com) wrote: > Thanks Mathieu for you response. I will try your suggestions. > > "It's a huge value. Shards can be split between nodes, do you target tu > use 15 nodes?" > > Hi Mat, > > - For examples if I have just one node, shards = 5, replica = 0. Then I > can easily backup the data by "cp /var/lib/elasticsearch/nodename > /somewhere/backup -rfp" > > - Now I add one more node, so the cluster has two nodes, shards = 5, > replica = 0. The shards are redistributed, maybe 1st node holds 0 2 4, 2nd > node holds 1 3. =\> How can I backup, each node does not hold the whole > data, can not simple cp ... > > - If I update replicas = 1, each node now have full 5 shards, I can easy > cp backup on any node. > > If you know the better way for backup which can handle distributed shards, > plz let me know. > > Thank you. > > PS : Can I reduce shards from 5 to 4 without losing data ? > > On Sunday, October 26, 2014 12:57:40 AM UTC+7, Mathieu Lecarme wrote: > > > Le vendredi 24 octobre 2014 10:43:21 UTC+2, Atrus a écrit : > > > > > - There is 15 shards per index, is this too much or enough ? I've used > > > the default config. I know that this could be effect the load but dont know > > > how to figure out the exact number. > > > > > > It's a huge value. Shards can be split between nodes, do you target tu > > > use 15 nodes? > > > > > - Is there any way to show the running queries ? something like mysql > > > show process list ? to show what queries have eat CPU alot. I have enable > > > slow log queries \>1s but found nothing. > > > > You can watch HTTP traffic, with pcap (I hack packetbeat, for that). It's > > from the outside, from the inside, use the hot thread. strace can help, too. > > > > > - Any suggestion is appreciate. > > > > Do you poll the \_nodes/stat url? a monitoring tool, or a web page like > > kopf? > > > > -- > > You received this message because you are subscribed to the Google Groups > > "elasticsearch" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > > To view this discussion on the web visit > > [https://groups.google.com/d/msgid/elasticsearch/4ab77f45-177d-4546-b953-5f38c7f4f5d1%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/4ab77f45-177d-4546-b953-5f38c7f4f5d1%40googlegroups.com) > > [https://groups.google.com/d/msgid/elasticsearch/4ab77f45-177d-4546-b953-5f38c7f4f5d1%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/4ab77f45-177d-4546-b953-5f38c7f4f5d1%40googlegroups.com?utm_medium=email&utm_source=footer) > > . > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoEAjqyXotjzP3STJcX2vMzjwBtjiWerOe0rF0wOtk1rsg%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoEAjqyXotjzP3STJcX2vMzjwBtjiWerOe0rF0wOtk1rsg%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Atrus](https://avatars.discourse-cdn.com/v4/letter/a/67e7ee/32.png) [@Atrus](https://discuss.elastic.co/u/Atrus)\ **Post date:** [October 26, 2014, 10:21am UTC](https://discuss.elastic.co/t/high-cpu-load-but-low-memory-usage/20417/7 "2014-10-26T10:21:29Z")
Thanks Jorg. "Use export/import tools and create new index." Such as ? Could you recommend me ? Thanks so much. BRs. On Sunday, October 26, 2014 5:08:33 PM UTC+7, Jörg Prante wrote: > For backup/restore, do not use cp. There is snapshot/restore for that. It > works on primary shards only. > > [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/modules-snapshots.html) > > You can not reduce shards in an existing index. Use export/import tools > and create new index. > > Jörg > > On Sun, Oct 26, 2014 at 3:44 AM, Atrus \<[anhh...@gmail.com](mailto:anhh...@gmail.com) \\> > wrote: > > > Thanks Mathieu for you response. I will try your suggestions. > > > > "It's a huge value. Shards can be split between nodes, do you target tu > > use 15 nodes?" > > > > Hi Mat, > > > > - For examples if I have just one node, shards = 5, replica = 0. Then I > > can easily backup the data by "cp /var/lib/elasticsearch/nodename > > /somewhere/backup -rfp" > > > > - Now I add one more node, so the cluster has two nodes, shards = 5, > > replica = 0. The shards are redistributed, maybe 1st node holds 0 2 4, 2nd > > node holds 1 3. =\> How can I backup, each node does not hold the whole > > data, can not simple cp ... > > > > - If I update replicas = 1, each node now have full 5 shards, I can easy > > cp backup on any node. > > > > If you know the better way for backup which can handle distributed > > shards, plz let me know. > > > > Thank you. > > > > PS : Can I reduce shards from 5 to 4 without losing data ? > > > > On Sunday, October 26, 2014 12:57:40 AM UTC+7, Mathieu Lecarme wrote: > > > > > Le vendredi 24 octobre 2014 10:43:21 UTC+2, Atrus a écrit : > > > > > > > - There is 15 shards per index, is this too much or enough ? I've used > > > > the default config. I know that this could be effect the load but dont know > > > > how to figure out the exact number. > > > > > > > > It's a huge value. Shards can be split between nodes, do you target tu > > > > use 15 nodes? > > > > > > > - Is there any way to show the running queries ? something like mysql > > > > show process list ? to show what queries have eat CPU alot. I have enable > > > > slow log queries \>1s but found nothing. > > > > > > You can watch HTTP traffic, with pcap (I hack packetbeat, for that). > > > It's from the outside, from the inside, use the hot thread. strace can > > > help, too. > > > > > > > - Any suggestion is appreciate. > > > > > > Do you poll the \_nodes/stat url? a monitoring tool, or a web page like > > > kopf? > > > > > > -- > > > You received this message because you are subscribed to the Google Groups > > > "elasticsearch" group. > > > To unsubscribe from this group and stop receiving emails from it, send an > > > email to [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com) \. > > > To view this discussion on the web visit > > > [https://groups.google.com/d/msgid/elasticsearch/4ab77f45-177d-4546-b953-5f38c7f4f5d1%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/4ab77f45-177d-4546-b953-5f38c7f4f5d1%40googlegroups.com) > > > [https://groups.google.com/d/msgid/elasticsearch/4ab77f45-177d-4546-b953-5f38c7f4f5d1%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/4ab77f45-177d-4546-b953-5f38c7f4f5d1%40googlegroups.com?utm_medium=email&utm_source=footer) > > > . > > > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/f234358a-ae82-4748-8717-65b2ec420c5c%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/f234358a-ae82-4748-8717-65b2ec420c5c%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![jprante](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jprante/32/44941_2.png) [@jprante](https://discuss.elastic.co/u/jprante)\ **Post date:** [October 26, 2014, 10:28am UTC](https://discuss.elastic.co/t/high-cpu-load-but-low-memory-usage/20417/8 "2014-10-26T10:28:48Z")
I have written a plugin for that > **[GitHub - jprante/elasticsearch-knapsack: Knapsack plugin is an import/export...](https://github.com/jprante/elasticsearch-knapsack)** > > Knapsack plugin is an import/export tool for Elasticsearch - GitHub - jprante/elasticsearch-knapsack: Knapsack plugin is an import/export tool for Elasticsearch maybe it fits your requirements. Jörg On Sun, Oct 26, 2014 at 11:21 AM, Atrus [anhhuyla@gmail.com](mailto:anhhuyla@gmail.com) wrote: > Thanks Jorg. > > "Use export/import tools and create new index." Such as ? > > Could you recommend me ? > > Thanks so much. > > BRs. > > On Sunday, October 26, 2014 5:08:33 PM UTC+7, Jörg Prante wrote: > > > For backup/restore, do not use cp. There is snapshot/restore for that. It > > works on primary shards only. > > > > [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/) > > reference/current/modules-snapshots.html > > > > You can not reduce shards in an existing index. Use export/import tools > > and create new index. > > > > Jörg > > > > On Sun, Oct 26, 2014 at 3:44 AM, Atrus [anhh...@gmail.com](mailto:anhh...@gmail.com) wrote: > > > > > Thanks Mathieu for you response. I will try your suggestions. > > > > > > "It's a huge value. Shards can be split between nodes, do you target tu > > > use 15 nodes?" > > > > > > Hi Mat, > > > > > > - For examples if I have just one node, shards = 5, replica = 0. Then I > > > can easily backup the data by "cp /var/lib/elasticsearch/nodename > > > /somewhere/backup -rfp" > > > > > > - Now I add one more node, so the cluster has two nodes, shards = 5, > > > replica = 0. The shards are redistributed, maybe 1st node holds 0 2 4, 2nd > > > node holds 1 3. =\> How can I backup, each node does not hold the whole > > > data, can not simple cp ... > > > > > > - If I update replicas = 1, each node now have full 5 shards, I can easy > > > cp backup on any node. > > > > > > If you know the better way for backup which can handle distributed > > > shards, plz let me know. > > > > > > Thank you. > > > > > > PS : Can I reduce shards from 5 to 4 without losing data ? > > > > > > On Sunday, October 26, 2014 12:57:40 AM UTC+7, Mathieu Lecarme wrote: > > > > > > > Le vendredi 24 octobre 2014 10:43:21 UTC+2, Atrus a écrit : > > > > > > > > > - There is 15 shards per index, is this too much or enough ? I've used > > > > > the default config. I know that this could be effect the load but dont know > > > > > how to figure out the exact number. > > > > > > > > > > It's a huge value. Shards can be split between nodes, do you target tu > > > > > use 15 nodes? > > > > > > > > > - Is there any way to show the running queries ? something like mysql > > > > > show process list ? to show what queries have eat CPU alot. I have enable > > > > > slow log queries \>1s but found nothing. > > > > > > > > You can watch HTTP traffic, with pcap (I hack packetbeat, for that). > > > > It's from the outside, from the inside, use the hot thread. strace can > > > > help, too. > > > > > > > > > - Any suggestion is appreciate. > > > > > > > > Do you poll the \_nodes/stat url? a monitoring tool, or a web page like > > > > kopf? > > > > > > > > -- > > > > You received this message because you are subscribed to the Google > > > > Groups "elasticsearch" group. > > > > To unsubscribe from this group and stop receiving emails from it, send > > > > an email to [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com). > > > > To view this discussion on the web visit [https://groups.google.com/d/](https://groups.google.com/d/) > > > > msgid/elasticsearch/4ab77f45-177d-4546-b953-5f38c7f4f5d1% > > > > [40googlegroups.com](http://40googlegroups.com) > > > > [https://groups.google.com/d/msgid/elasticsearch/4ab77f45-177d-4546-b953-5f38c7f4f5d1%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/4ab77f45-177d-4546-b953-5f38c7f4f5d1%40googlegroups.com?utm_medium=email&utm_source=footer) > > > > . > > > > > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). > > > > -- > > You received this message because you are subscribed to the Google Groups > > "elasticsearch" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > > To view this discussion on the web visit > > [https://groups.google.com/d/msgid/elasticsearch/f234358a-ae82-4748-8717-65b2ec420c5c%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/f234358a-ae82-4748-8717-65b2ec420c5c%40googlegroups.com) > > [https://groups.google.com/d/msgid/elasticsearch/f234358a-ae82-4748-8717-65b2ec420c5c%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/f234358a-ae82-4748-8717-65b2ec420c5c%40googlegroups.com?utm_medium=email&utm_source=footer) > > . > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoGtnN2uuc2yEc5fn%2BBuRM%3DEjLdh5SWnvHGJLbWa%2BkAgJQ%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoGtnN2uuc2yEc5fn%2BBuRM%3DEjLdh5SWnvHGJLbWa%2BkAgJQ%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Atrus](https://avatars.discourse-cdn.com/v4/letter/a/67e7ee/32.png) [@Atrus](https://discuss.elastic.co/u/Atrus)\ **Post date:** [October 28, 2014, 10:02am UTC](https://discuss.elastic.co/t/high-cpu-load-but-low-memory-usage/20417/9 "2014-10-28T10:02:29Z")
Hi Jorg, This is hot thread info when CPU get high : ::: [Search-195][W2LL0dnBSGu\_5k7fAHt0uA][inet[/195:9300]]{master=true} 28.1% (140.4ms out of 500ms) cpu usage by thread 'elasticsearch[Search-195][search][T#22]' ``` 10/10 snapshots sharing following 10 elements sun.misc.Unsafe.park(Native Method) java.util.concurrent.locks.LockSupport.park(Unknown Source) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.awaitMatch(LinkedTransferQueue.java:706) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.xfer(LinkedTransferQueue.java:615) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.take(LinkedTransferQueue.java:1109) org.elasticsearch.common.util.concurrent.SizeBlockingQueue.take(SizeBlockingQueue.java:162) java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source) ``` 24.7% (123.4ms out of 500ms) cpu usage by thread 'elasticsearch[Search-195][search][T#9]' ``` 10/10 snapshots sharing following 10 elements sun.misc.Unsafe.park(Native Method) java.util.concurrent.locks.LockSupport.park(Unknown Source) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.awaitMatch(LinkedTransferQueue.java:706) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.xfer(LinkedTransferQueue.java:615) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.take(LinkedTransferQueue.java:1109) org.elasticsearch.common.util.concurrent.SizeBlockingQueue.take(SizeBlockingQueue.java:162) java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source) ``` 24.0% (119.8ms out of 500ms) cpu usage by thread 'elasticsearch[Search-195][search][T#19]' ``` 7/10 snapshots sharing following 10 elements sun.misc.Unsafe.park(Native Method) java.util.concurrent.locks.LockSupport.park(Unknown Source) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.awaitMatch(LinkedTransferQueue.java:706) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.xfer(LinkedTransferQueue.java:615) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.take(LinkedTransferQueue.java:1109) org.elasticsearch.common.util.concurrent.SizeBlockingQueue.take(SizeBlockingQueue.java:162) java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source) 3/10 snapshots sharing following 23 elements org.apache.lucene.search.FilteredDocIdSetIterator.nextDoc(FilteredDocIdSetIterator.java:60) org.elasticsearch.index.search.child.ConstantScorer.nextDoc(ConstantScorer.java:48) org.elasticsearch.common.lucene.docset.DocIdSets.toCacheable(DocIdSets.java:94) org.elasticsearch.index.search.child.CustomQueryWrappingFilter.getDocIdSet(CustomQueryWrappingFilter.java:73) org.elasticsearch.common.lucene.search.AndFilter.getDocIdSet(AndFilter.java:54) org.elasticsearch.common.lucene.search.ApplyAcceptedDocsFilter.getDocIdSet(ApplyAcceptedDocsFilter.java:45) org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:128) org.apache.lucene.search.FilteredQuery$RandomAccessFilterStrategy.filteredScorer(FilteredQuery.java:533) org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:133) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:618) org.elasticsearch.search.internal.ContextIndexSearcher.search(ContextIndexSearcher.java:173) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:581) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:533) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:510) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:345) org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:115) org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:249) org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:623) org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:612) org.elasticsearch.transport.netty.MessageChannelHandler$RequestHandler.run(MessageChannelHandler.java:270) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source) ``` ::: [Search-240][r3ykBu\_4QOGwmJRlbbhnsg][inet[/.240:9300]]{master=true} 33.1% (165.2ms out of 500ms) cpu usage by thread 'elasticsearch[Search-240][search][T#24]' ``` 8/10 snapshots sharing following 10 elements sun.misc.Unsafe.park(Native Method) java.util.concurrent.locks.LockSupport.park(Unknown Source) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.awaitMatch(LinkedTransferQueue.java:706) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.xfer(LinkedTransferQueue.java:615) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.take(LinkedTransferQueue.java:1109) org.elasticsearch.common.util.concurrent.SizeBlockingQueue.take(SizeBlockingQueue.java:162) java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source) 2/10 snapshots sharing following 23 elements org.apache.lucene.search.FilteredDocIdSetIterator.nextDoc(FilteredDocIdSetIterator.java:60) org.elasticsearch.index.search.child.ConstantScorer.nextDoc(ConstantScorer.java:48) org.elasticsearch.common.lucene.docset.DocIdSets.toCacheable(DocIdSets.java:94) org.elasticsearch.index.search.child.CustomQueryWrappingFilter.getDocIdSet(CustomQueryWrappingFilter.java:73) org.elasticsearch.common.lucene.search.AndFilter.getDocIdSet(AndFilter.java:54) org.elasticsearch.common.lucene.search.ApplyAcceptedDocsFilter.getDocIdSet(ApplyAcceptedDocsFilter.java:45) org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:128) org.apache.lucene.search.FilteredQuery$RandomAccessFilterStrategy.filteredScorer(FilteredQuery.java:533) org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:133) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:618) org.elasticsearch.search.internal.ContextIndexSearcher.search(ContextIndexSearcher.java:173) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:581) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:533) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:510) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:345) org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:115) org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:249) org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:623) org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:612) org.elasticsearch.transport.netty.MessageChannelHandler$RequestHandler.run(MessageChannelHandler.java:270) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source) ``` 31.2% (156.1ms out of 500ms) cpu usage by thread 'elasticsearch[Search-240][search][T#4]' ``` 10/10 snapshots sharing following 3 elements java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source) ``` 31.1% (155.6ms out of 500ms) cpu usage by thread 'elasticsearch[Search-240][search][T#6]' ``` 7/10 snapshots sharing following 10 elements sun.misc.Unsafe.park(Native Method) java.util.concurrent.locks.LockSupport.park(Unknown Source) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.awaitMatch(LinkedTransferQueue.java:706) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.xfer(LinkedTransferQueue.java:615) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.take(LinkedTransferQueue.java:1109) org.elasticsearch.common.util.concurrent.SizeBlockingQueue.take(SizeBlockingQueue.java:162) java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source) 3/10 snapshots sharing following 25 elements org.apache.lucene.search.FilteredDocIdSetIterator.nextDoc(FilteredDocIdSetIterator.java:60) org.elasticsearch.index.search.child.ConstantScorer.nextDoc(ConstantScorer.java:48) org.elasticsearch.common.lucene.docset.DocIdSets.toCacheable(DocIdSets.java:94) org.elasticsearch.index.search.child.CustomQueryWrappingFilter.getDocIdSet(CustomQueryWrappingFilter.java:73) org.elasticsearch.common.lucene.search.AndFilter.getDocIdSet(AndFilter.java:50) org.elasticsearch.common.lucene.search.ApplyAcceptedDocsFilter.getDocIdSet(ApplyAcceptedDocsFilter.java:45) org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:128) org.apache.lucene.search.FilteredQuery$RandomAccessFilterStrategy.filteredScorer(FilteredQuery.java:533) org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:133) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:618) org.elasticsearch.search.internal.ContextIndexSearcher.search(ContextIndexSearcher.java:173) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:491) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:448) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:281) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:269) org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:122) org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:249) org.elasticsearch.search.action.SearchServiceTransportAction.sendExecuteQuery(SearchServiceTransportAction.java:202) org.elasticsearch.action.search.type.TransportSearchQueryThenFetchAction$AsyncAction.sendExecuteFirstPhase(TransportSearchQueryThenFetchAction.java:80) org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction.performFirstPhase(TransportSearchTypeAction.java:216) org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction.performFirstPhase(TransportSearchTypeAction.java:203) org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction$2.run(TransportSearchTypeAction.java:186) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source) ``` ::: [Search-198][lWVoNoSKQdWZ\_TrrpjZX5Q][inet[/198:9300]]{master=true} 27.6% (138.2ms out of 500ms) cpu usage by thread 'elasticsearch[Search-198][search][T#14]' ``` 2/10 snapshots sharing following 14 elements org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:621) org.elasticsearch.search.internal.ContextIndexSearcher.search(ContextIndexSearcher.java:173) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:491) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:448) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:281) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:269) org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:122) org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:249) org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:623) org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:612) org.elasticsearch.transport.netty.MessageChannelHandler$RequestHandler.run(MessageChannelHandler.java:270) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source) 8/10 snapshots sharing following 10 elements sun.misc.Unsafe.park(Native Method) java.util.concurrent.locks.LockSupport.park(Unknown Source) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.awaitMatch(LinkedTransferQueue.java:706) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.xfer(LinkedTransferQueue.java:615) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.take(LinkedTransferQueue.java:1109) org.elasticsearch.common.util.concurrent.SizeBlockingQueue.take(SizeBlockingQueue.java:162) java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source) ``` 25.6% (127.8ms out of 500ms) cpu usage by thread 'elasticsearch[Search-198][search][T#21]' ``` 6/10 snapshots sharing following 10 elements sun.misc.Unsafe.park(Native Method) java.util.concurrent.locks.LockSupport.park(Unknown Source) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.awaitMatch(LinkedTransferQueue.java:706) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.xfer(LinkedTransferQueue.java:615) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.take(LinkedTransferQueue.java:1109) org.elasticsearch.common.util.concurrent.SizeBlockingQueue.take(SizeBlockingQueue.java:162) java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source) 2/10 snapshots sharing following 24 elements org.elasticsearch.index.search.child.ParentConstantScoreQuery$ChildrenWeight$ChildrenDocIdIterator.match(ParentConstantScoreQuery.java:176) org.apache.lucene.search.FilteredDocIdSetIterator.nextDoc(FilteredDocIdSetIterator.java:60) org.elasticsearch.index.search.child.ConstantScorer.nextDoc(ConstantScorer.java:48) org.elasticsearch.common.lucene.docset.DocIdSets.toCacheable(DocIdSets.java:94) org.elasticsearch.index.search.child.CustomQueryWrappingFilter.getDocIdSet(CustomQueryWrappingFilter.java:73) org.elasticsearch.common.lucene.search.AndFilter.getDocIdSet(AndFilter.java:50) org.elasticsearch.common.lucene.search.ApplyAcceptedDocsFilter.getDocIdSet(ApplyAcceptedDocsFilter.java:45) org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:128) org.apache.lucene.search.FilteredQuery$RandomAccessFilterStrategy.filteredScorer(FilteredQuery.java:533) org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:133) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:618) org.elasticsearch.search.internal.ContextIndexSearcher.search(ContextIndexSearcher.java:173) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:491) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:448) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:281) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:269) org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:122) org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:249) org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:623) org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:612) org.elasticsearch.transport.netty.MessageChannelHandler$RequestHandler.run(MessageChannelHandler.java:270) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source) 2/10 snapshots sharing following 22 elements org.apache.lucene.search.MultiTermQueryWrapperFilter.getDocIdSet(MultiTermQueryWrapperFilter.java:111) org.apache.lucene.search.ConstantScoreQuery$ConstantWeight.scorer(ConstantScoreQuery.java:142) org.apache.lucene.search.BooleanQuery$BooleanWeight.scorer(BooleanQuery.java:311) org.apache.lucene.search.FilteredQuery$QueryFirstFilterStrategy.filteredScorer(FilteredQuery.java:612) org.elasticsearch.common.lucene.search.XFilteredQuery$CustomRandomAccessFilterStrategy.filteredScorer(XFilteredQuery.java:229) org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:133) org.apache.lucene.search.FilteredQuery$RandomAccessFilterStrategy.filteredScorer(FilteredQuery.java:533) org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:133) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:618) org.elasticsearch.search.internal.ContextIndexSearcher.search(ContextIndexSearcher.java:173) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:491) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:448) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:281) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:269) org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:122) org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:249) org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:623) org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:612) org.elasticsearch.transport.netty.MessageChannelHandler$RequestHandler.run(MessageChannelHandler.java:270) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source) ``` 24.4% (122ms out of 500ms) cpu usage by thread 'elasticsearch[Search-198][search][T#10]' ``` 10/10 snapshots sharing following 10 elements sun.misc.Unsafe.park(Native Method) java.util.concurrent.locks.LockSupport.park(Unknown Source) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.awaitMatch(LinkedTransferQueue.java:706) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.xfer(LinkedTransferQueue.java:615) org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.take(LinkedTransferQueue.java:1109) org.elasticsearch.common.util.concurrent.SizeBlockingQueue.take(SizeBlockingQueue.java:162) java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) java.lang.Thread.run(Unknown Source) ``` I dont know what the problem is. Plz give some suggests. Thanks & BRs. On Saturday, October 25, 2014 7:43:50 PM UTC+7, Jörg Prante wrote: > Please post the result of "hot threads" action on a gist/paste page so we > can understand your problem better. > > [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/cluster-nodes-hot-threads.html) > > Jörg -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/d760d84b-f2b9-49d3-99de-6dc7bb95ca1d%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/d760d84b-f2b9-49d3-99de-6dc7bb95ca1d%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![jprante](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jprante/32/44941_2.png) [@jprante](https://discuss.elastic.co/u/jprante)\ **Post date:** [October 28, 2014, 1:04pm UTC](https://discuss.elastic.co/t/high-cpu-load-but-low-memory-usage/20417/10 "2014-10-28T13:04:10Z")
Did your search queries change recently? You have some options - optimize indices to reduce segments, therefore faster search - optimize queries, use filter/constant score instead of query/score - use caching for filtered queries if you have queries that repeat Jörg On Tue, Oct 28, 2014 at 11:02 AM, Anh Huy Do [anhhuyla@gmail.com](mailto:anhhuyla@gmail.com) wrote: > Hi Jorg, > > This is hot thread info when CPU get high : > > ::: [Search-195][W2LL0dnBSGu\_5k7fAHt0uA][inet[/195:9300]]{master=true} > > 28.1% (140.4ms out of 500ms) cpu usage by thread > 'elasticsearch[Search-195][search][T#22]' > > ``` > 10/10 snapshots sharing following 10 elements > > sun.misc.Unsafe.park(Native Method) > > java.util.concurrent.locks.LockSupport.park(Unknown Source) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.awaitMatch(LinkedTransferQueue.java:706) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.xfer(LinkedTransferQueue.java:615) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.take(LinkedTransferQueue.java:1109) > > org.elasticsearch.common.util.concurrent.SizeBlockingQueue.take(SizeBlockingQueue.java:162) > > java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > > java.lang.Thread.run(Unknown Source) > > ``` > > 24.7% (123.4ms out of 500ms) cpu usage by thread > 'elasticsearch[Search-195][search][T#9]' > > ``` > 10/10 snapshots sharing following 10 elements > > sun.misc.Unsafe.park(Native Method) > > java.util.concurrent.locks.LockSupport.park(Unknown Source) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.awaitMatch(LinkedTransferQueue.java:706) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.xfer(LinkedTransferQueue.java:615) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.take(LinkedTransferQueue.java:1109) > > org.elasticsearch.common.util.concurrent.SizeBlockingQueue.take(SizeBlockingQueue.java:162) > > java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > > java.lang.Thread.run(Unknown Source) > > ``` > > 24.0% (119.8ms out of 500ms) cpu usage by thread > 'elasticsearch[Search-195][search][T#19]' > > ``` > 7/10 snapshots sharing following 10 elements > > sun.misc.Unsafe.park(Native Method) > > java.util.concurrent.locks.LockSupport.park(Unknown Source) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.awaitMatch(LinkedTransferQueue.java:706) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.xfer(LinkedTransferQueue.java:615) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.take(LinkedTransferQueue.java:1109) > > org.elasticsearch.common.util.concurrent.SizeBlockingQueue.take(SizeBlockingQueue.java:162) > > java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > > java.lang.Thread.run(Unknown Source) > > 3/10 snapshots sharing following 23 elements > > org.apache.lucene.search.FilteredDocIdSetIterator.nextDoc(FilteredDocIdSetIterator.java:60) > > org.elasticsearch.index.search.child.ConstantScorer.nextDoc(ConstantScorer.java:48) > > org.elasticsearch.common.lucene.docset.DocIdSets.toCacheable(DocIdSets.java:94) > > org.elasticsearch.index.search.child.CustomQueryWrappingFilter.getDocIdSet(CustomQueryWrappingFilter.java:73) > > org.elasticsearch.common.lucene.search.AndFilter.getDocIdSet(AndFilter.java:54) > > org.elasticsearch.common.lucene.search.ApplyAcceptedDocsFilter.getDocIdSet(ApplyAcceptedDocsFilter.java:45) > > org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:128) > > org.apache.lucene.search.FilteredQuery$RandomAccessFilterStrategy.filteredScorer(FilteredQuery.java:533) > > org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:133) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:618) > > org.elasticsearch.search.internal.ContextIndexSearcher.search(ContextIndexSearcher.java:173) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:581) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:533) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:510) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:345) > > org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:115) > > org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:249) > > org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:623) > > org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:612) > > org.elasticsearch.transport.netty.MessageChannelHandler$RequestHandler.run(MessageChannelHandler.java:270) > > java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > > java.lang.Thread.run(Unknown Source) > > ``` > > ::: [Search-240][r3ykBu\_4QOGwmJRlbbhnsg][inet[/.240:9300]]{master=true} > > 33.1% (165.2ms out of 500ms) cpu usage by thread > 'elasticsearch[Search-240][search][T#24]' > > ``` > 8/10 snapshots sharing following 10 elements > > sun.misc.Unsafe.park(Native Method) > > java.util.concurrent.locks.LockSupport.park(Unknown Source) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.awaitMatch(LinkedTransferQueue.java:706) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.xfer(LinkedTransferQueue.java:615) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.take(LinkedTransferQueue.java:1109) > > org.elasticsearch.common.util.concurrent.SizeBlockingQueue.take(SizeBlockingQueue.java:162) > > java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > > java.lang.Thread.run(Unknown Source) > > 2/10 snapshots sharing following 23 elements > > org.apache.lucene.search.FilteredDocIdSetIterator.nextDoc(FilteredDocIdSetIterator.java:60) > > org.elasticsearch.index.search.child.ConstantScorer.nextDoc(ConstantScorer.java:48) > > org.elasticsearch.common.lucene.docset.DocIdSets.toCacheable(DocIdSets.java:94) > > org.elasticsearch.index.search.child.CustomQueryWrappingFilter.getDocIdSet(CustomQueryWrappingFilter.java:73) > > org.elasticsearch.common.lucene.search.AndFilter.getDocIdSet(AndFilter.java:54) > > org.elasticsearch.common.lucene.search.ApplyAcceptedDocsFilter.getDocIdSet(ApplyAcceptedDocsFilter.java:45) > > org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:128) > > org.apache.lucene.search.FilteredQuery$RandomAccessFilterStrategy.filteredScorer(FilteredQuery.java:533) > > org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:133) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:618) > > org.elasticsearch.search.internal.ContextIndexSearcher.search(ContextIndexSearcher.java:173) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:581) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:533) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:510) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:345) > > org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:115) > > org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:249) > > org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:623) > > org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:612) > > org.elasticsearch.transport.netty.MessageChannelHandler$RequestHandler.run(MessageChannelHandler.java:270) > > java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > > java.lang.Thread.run(Unknown Source) > > ``` > > 31.2% (156.1ms out of 500ms) cpu usage by thread > 'elasticsearch[Search-240][search][T#4]' > > ``` > 10/10 snapshots sharing following 3 elements > > java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > > java.lang.Thread.run(Unknown Source) > > ``` > > 31.1% (155.6ms out of 500ms) cpu usage by thread > 'elasticsearch[Search-240][search][T#6]' > > ``` > 7/10 snapshots sharing following 10 elements > > sun.misc.Unsafe.park(Native Method) > > java.util.concurrent.locks.LockSupport.park(Unknown Source) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.awaitMatch(LinkedTransferQueue.java:706) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.xfer(LinkedTransferQueue.java:615) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.take(LinkedTransferQueue.java:1109) > > org.elasticsearch.common.util.concurrent.SizeBlockingQueue.take(SizeBlockingQueue.java:162) > > java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > > java.lang.Thread.run(Unknown Source) > > 3/10 snapshots sharing following 25 elements > > org.apache.lucene.search.FilteredDocIdSetIterator.nextDoc(FilteredDocIdSetIterator.java:60) > > org.elasticsearch.index.search.child.ConstantScorer.nextDoc(ConstantScorer.java:48) > > org.elasticsearch.common.lucene.docset.DocIdSets.toCacheable(DocIdSets.java:94) > > org.elasticsearch.index.search.child.CustomQueryWrappingFilter.getDocIdSet(CustomQueryWrappingFilter.java:73) > > org.elasticsearch.common.lucene.search.AndFilter.getDocIdSet(AndFilter.java:50) > > org.elasticsearch.common.lucene.search.ApplyAcceptedDocsFilter.getDocIdSet(ApplyAcceptedDocsFilter.java:45) > > org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:128) > > org.apache.lucene.search.FilteredQuery$RandomAccessFilterStrategy.filteredScorer(FilteredQuery.java:533) > > org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:133) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:618) > > org.elasticsearch.search.internal.ContextIndexSearcher.search(ContextIndexSearcher.java:173) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:491) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:448) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:281) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:269) > > org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:122) > > org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:249) > > org.elasticsearch.search.action.SearchServiceTransportAction.sendExecuteQuery(SearchServiceTransportAction.java:202) > > org.elasticsearch.action.search.type.TransportSearchQueryThenFetchAction$AsyncAction.sendExecuteFirstPhase(TransportSearchQueryThenFetchAction.java:80) > > org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction.performFirstPhase(TransportSearchTypeAction.java:216) > > org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction.performFirstPhase(TransportSearchTypeAction.java:203) > > org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction$2.run(TransportSearchTypeAction.java:186) > > java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > > java.lang.Thread.run(Unknown Source) > > ``` > > ::: [Search-198][lWVoNoSKQdWZ\_TrrpjZX5Q][inet[/198:9300]]{master=true} > > 27.6% (138.2ms out of 500ms) cpu usage by thread > 'elasticsearch[Search-198][search][T#14]' > > ``` > 2/10 snapshots sharing following 14 elements > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:621) > > org.elasticsearch.search.internal.ContextIndexSearcher.search(ContextIndexSearcher.java:173) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:491) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:448) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:281) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:269) > > org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:122) > > org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:249) > > org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:623) > > org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:612) > > org.elasticsearch.transport.netty.MessageChannelHandler$RequestHandler.run(MessageChannelHandler.java:270) > > java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > > java.lang.Thread.run(Unknown Source) > > 8/10 snapshots sharing following 10 elements > > sun.misc.Unsafe.park(Native Method) > > java.util.concurrent.locks.LockSupport.park(Unknown Source) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.awaitMatch(LinkedTransferQueue.java:706) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.xfer(LinkedTransferQueue.java:615) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.take(LinkedTransferQueue.java:1109) > > org.elasticsearch.common.util.concurrent.SizeBlockingQueue.take(SizeBlockingQueue.java:162) > > java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > > java.lang.Thread.run(Unknown Source) > > ``` > > 25.6% (127.8ms out of 500ms) cpu usage by thread > 'elasticsearch[Search-198][search][T#21]' > > ``` > 6/10 snapshots sharing following 10 elements > > sun.misc.Unsafe.park(Native Method) > > java.util.concurrent.locks.LockSupport.park(Unknown Source) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.awaitMatch(LinkedTransferQueue.java:706) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.xfer(LinkedTransferQueue.java:615) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.take(LinkedTransferQueue.java:1109) > > org.elasticsearch.common.util.concurrent.SizeBlockingQueue.take(SizeBlockingQueue.java:162) > > java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > > java.lang.Thread.run(Unknown Source) > > 2/10 snapshots sharing following 24 elements > > org.elasticsearch.index.search.child.ParentConstantScoreQuery$ChildrenWeight$ChildrenDocIdIterator.match(ParentConstantScoreQuery.java:176) > > org.apache.lucene.search.FilteredDocIdSetIterator.nextDoc(FilteredDocIdSetIterator.java:60) > > org.elasticsearch.index.search.child.ConstantScorer.nextDoc(ConstantScorer.java:48) > > org.elasticsearch.common.lucene.docset.DocIdSets.toCacheable(DocIdSets.java:94) > > org.elasticsearch.index.search.child.CustomQueryWrappingFilter.getDocIdSet(CustomQueryWrappingFilter.java:73) > > org.elasticsearch.common.lucene.search.AndFilter.getDocIdSet(AndFilter.java:50) > > org.elasticsearch.common.lucene.search.ApplyAcceptedDocsFilter.getDocIdSet(ApplyAcceptedDocsFilter.java:45) > > org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:128) > > org.apache.lucene.search.FilteredQuery$RandomAccessFilterStrategy.filteredScorer(FilteredQuery.java:533) > > org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:133) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:618) > > org.elasticsearch.search.internal.ContextIndexSearcher.search(ContextIndexSearcher.java:173) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:491) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:448) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:281) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:269) > > org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:122) > > org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:249) > > org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:623) > > org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:612) > > org.elasticsearch.transport.netty.MessageChannelHandler$RequestHandler.run(MessageChannelHandler.java:270) > > java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > > java.lang.Thread.run(Unknown Source) > > 2/10 snapshots sharing following 22 elements > > org.apache.lucene.search.MultiTermQueryWrapperFilter.getDocIdSet(MultiTermQueryWrapperFilter.java:111) > > org.apache.lucene.search.ConstantScoreQuery$ConstantWeight.scorer(ConstantScoreQuery.java:142) > > org.apache.lucene.search.BooleanQuery$BooleanWeight.scorer(BooleanQuery.java:311) > > org.apache.lucene.search.FilteredQuery$QueryFirstFilterStrategy.filteredScorer(FilteredQuery.java:612) > > org.elasticsearch.common.lucene.search.XFilteredQuery$CustomRandomAccessFilterStrategy.filteredScorer(XFilteredQuery.java:229) > > org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:133) > > org.apache.lucene.search.FilteredQuery$RandomAccessFilterStrategy.filteredScorer(FilteredQuery.java:533) > > org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:133) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:618) > > org.elasticsearch.search.internal.ContextIndexSearcher.search(ContextIndexSearcher.java:173) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:491) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:448) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:281) > > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:269) > > org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:122) > > org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:249) > > org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:623) > > org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:612) > > org.elasticsearch.transport.netty.MessageChannelHandler$RequestHandler.run(MessageChannelHandler.java:270) > > java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > > java.lang.Thread.run(Unknown Source) > > ``` > > 24.4% (122ms out of 500ms) cpu usage by thread > 'elasticsearch[Search-198][search][T#10]' > > ``` > 10/10 snapshots sharing following 10 elements > > sun.misc.Unsafe.park(Native Method) > > java.util.concurrent.locks.LockSupport.park(Unknown Source) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.awaitMatch(LinkedTransferQueue.java:706) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.xfer(LinkedTransferQueue.java:615) > > org.elasticsearch.common.util.concurrent.jsr166y.LinkedTransferQueue.take(LinkedTransferQueue.java:1109) > > org.elasticsearch.common.util.concurrent.SizeBlockingQueue.take(SizeBlockingQueue.java:162) > > java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) > > java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) > > java.lang.Thread.run(Unknown Source) > > ``` > > I dont know what the problem is. > > Plz give some suggests. > > Thanks & BRs. > > On Saturday, October 25, 2014 7:43:50 PM UTC+7, Jörg Prante wrote: > > > Please post the result of "hot threads" action on a gist/paste page so we > > can understand your problem better. > > > > [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/) > > reference/current/cluster-nodes-hot-threads.html > > > > Jörg > > > > -- > > You received this message because you are subscribed to 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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 12:53am UTC](https://discuss.elastic.co/t/high-cpu-load-but-low-memory-usage/20417/11 "2017-07-06T00:53:27Z")