# ElasticSearch gc performance on cluster **URL:** \ **Category:** Elasticsearch\ **Created:** [February 23, 2015, 12:08pm UTC](https://discuss.elastic.co/t/elasticsearch-gc-performance-on-cluster/22328 "2015-02-23T12:08:02Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Phani\_Nadiminti](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/phani_nadiminti/32/45381_2.png) [@Phani\_Nadiminti](https://discuss.elastic.co/u/Phani_Nadiminti)\ **Post date:** [February 23, 2015, 12:08pm UTC](https://discuss.elastic.co/t/elasticsearch-gc-performance-on-cluster/22328/1 "2015-02-23T12:08:02Z")
Hi All, I have few doubts around es JVM setting and GC scenarios. i have the following cluster. i have 2 nodes in my cluster Node 1 : memory 24 GB Heap space allocated : 12 GB Node 2 : memory 24 GB Heap space allocated : 12 GB ``` No of Records will index in to ES per day is 750,000 ``` Few days back i am getting following information from elastic search frequently. ``` [2015-02-19 08:39:35,445][INFO][monitor.jvm] [node2] ``` [gc][young][794293][3926] duration [812ms], collections [1]/[1s], total [812ms]/[5.9m], memory [8gb]-\>[8.2gb]/[11.9gb], all\_pools {[young] [33.1mb]-\>[64.1mb]/[133.1mb]}{[survivor] [16.6mb]-\>[16.6mb]/[16.6mb]}{[old] [8gb]-\>[8.1gb]/[11.8gb]} [2015-02-19 08:40:08,079][INFO][monitor.jvm] [node2] [gc][young][794323][3972] duration [729ms], collections [1]/[1s], total [729ms]/[6.1m], memory [3.6gb]-\>[3.8gb]/[11.9gb], all\_pools {[young] [3.6mb]-\>[53mb]/[133.1mb]}{[survivor] [16.6mb]-\>[16.6mb]/[16.6mb]}{[old] [3.6gb]-\>[3.7gb]/[11.8gb]} ``` when i do some R & D around i got a point this will perform by ``` garbage collector young to sweep the memory. if i got gc long pauses my records indexing process will interrupt i may lose some data. ``` ES suggesting no JVM tweaking required. so please suggest me where i ``` need to optimize the cluster to get rid of GC pauses based on my configurations. Thanks, phani -- 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/957b1e14-1ebe-4841-98e1-6bebc9444b25%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/957b1e14-1ebe-4841-98e1-6bebc9444b25%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [February 24, 2015, 8:18am UTC](https://discuss.elastic.co/t/elasticsearch-gc-performance-on-cluster/22328/2 "2015-02-24T08:18:40Z")
You don't really have much to worry about here, you aren't even hitting single second GC periods. On 23 February 2015 at 23:08, [phani.nadiminti@goktree.com](mailto:phani.nadiminti@goktree.com) wrote: > Hi All, > > I have few doubts around es JVM setting and GC scenarios. i have the > following cluster. i have 2 nodes in my cluster > > Node 1 : memory 24 GB Heap space allocated : 12 GB > Node 2 : memory 24 GB Heap space allocated : 12 GB > > ``` > No of Records will index in to ES per day is 750,000 > > ``` > > Few days back i am getting following information from Elasticsearch > frequently. > > ``` > [2015-02-19 08:39:35,445][INFO][monitor.jvm] [node2] > > ``` > > [gc][young][794293][3926] duration [812ms], collections [1]/[1s], total > [812ms]/[5.9m], memory [8gb]-\>[8.2gb]/[11.9gb], all\_pools {[young] > [33.1mb]-\>[64.1mb]/[133.1mb]}{[survivor] [16.6mb]-\>[16.6mb]/[16.6mb]}{[old] > [8gb]-\>[8.1gb]/[11.8gb]} > > [2015-02-19 08:40:08,079][INFO][monitor.jvm] [node2] > [gc][young][794323][3972] duration [729ms], collections [1]/[1s], total > [729ms]/[6.1m], memory [3.6gb]-\>[3.8gb]/[11.9gb], all\_pools {[young] > [3.6mb]-\>[53mb]/[133.1mb]}{[survivor] [16.6mb]-\>[16.6mb]/[16.6mb]}{[old] > [3.6gb]-\>[3.7gb]/[11.8gb]} > > ``` > when i do some R & D around i got a point this will perform by > > ``` > > garbage collector young to sweep the memory. if i got gc long pauses my > records indexing process will interrupt i may lose some data. > > ``` > ES suggesting no JVM tweaking required. so please suggest me where > > ``` > > i need to optimize the cluster to get rid of GC pauses based on my > configurations. > > Thanks, > phani > > -- > 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/957b1e14-1ebe-4841-98e1-6bebc9444b25%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/957b1e14-1ebe-4841-98e1-6bebc9444b25%40googlegroups.com) > [https://groups.google.com/d/msgid/elasticsearch/957b1e14-1ebe-4841-98e1-6bebc9444b25%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/957b1e14-1ebe-4841-98e1-6bebc9444b25%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/CAEYi1X\_aRxGetyPcwfcdCaRS26gXi%3Do7vYU9xSX4HY7m7uySfw%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAEYi1X_aRxGetyPcwfcdCaRS26gXi%3Do7vYU9xSX4HY7m7uySfw%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Phani\_Nadiminti](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/phani_nadiminti/32/45381_2.png) [@Phani\_Nadiminti](https://discuss.elastic.co/u/Phani_Nadiminti)\ **Post date:** [October 28, 2015, 2:11pm UTC](https://discuss.elastic.co/t/elasticsearch-gc-performance-on-cluster/22328/3 "2015-10-28T14:11:28Z")
Hi , I have all my production cluster nodes are master nodes let say gc is performing on node1 the request will be stop if it has long gc pause.so at that time node1 not able to server request .can node2 will server request if node1 has long gc pause? Thanks & Regards, phani ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 5, 2017, 11:42pm UTC](https://discuss.elastic.co/t/elasticsearch-gc-performance-on-cluster/22328/4 "2017-07-05T23:42:09Z")