# Very long gc pause caused by ES

**URL:** <https://discuss.elastic.co/t/very-long-gc-pause-caused-by-es/29103>\
**Category:** Elasticsearch\
**Created:** [September 11, 2015, 8:40am UTC](https://discuss.elastic.co/t/very-long-gc-pause-caused-by-es/29103 "2015-09-11T08:40:07Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![makeyang](https://avatars.discourse-cdn.com/v4/letter/m/f05b48/32.png) [@makeyang](https://discuss.elastic.co/u/makeyang)\
**Post date:** [September 11, 2015, 8:40am UTC](https://discuss.elastic.co/t/very-long-gc-pause-caused-by-es/29103/1 "2015-09-11T08:40:07Z")

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```
      [2015-09-11 11:49:22,429][WARN][monitor.jvm]

```

[node-173.65] [gc][ParNew][47112][14482] duration [11.3h], collections  
[1]/[11.3h], total [11.3h]/[11.4h], memory [4.5gb]-\>[3.2gb]/[15.7gb],  
all\_pools {[Code Cache] [12.4mb]-\>[12.4mb]/[48mb]}{[Par Eden Space]  
[1.5gb]-\>[157.6mb]/[1.5gb]}{[Par Survivor Space]  
[67.5mb]-\>[79.2mb]/[227.5mb]}{[CMS Old Gen]  
[2.9gb]-\>[2.9gb]/[14gb]}{[CMS Perm Gen]  
[45.2mb]-\>[45.2mb]/[128mb]}

JVM parameters:

-Xss256k

-Xmn2048M

-XX:PermSize=128M

-XX:MaxPermSize=128M

-XX:SurvivorRatio=7

-XX:GCTimeRatio=49

-XX:MaxTenuringThreshold=12

-XX:+UseConcMarkSweepGC

-XX:MaxGCPauseMillis=200

-XX:+UnlockExperimentalVMOptions  
-Xms:16g

-Xmx:16g  
JDK version: 1.6.0.45

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<div class="post-metadata">

**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:** [September 11, 2015, 9:15am UTC](https://discuss.elastic.co/t/very-long-gc-pause-caused-by-es/29103/2 "2015-09-11T09:15:26Z")

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What do you want to know here, because all you have done is post some text and given us no context as to what you are looking for.

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<div class="post-metadata">

**Author:** ![makeyang](https://avatars.discourse-cdn.com/v4/letter/m/f05b48/32.png) [@makeyang](https://discuss.elastic.co/u/makeyang)\
**Post date:** [September 11, 2015, 9:53am UTC](https://discuss.elastic.co/t/very-long-gc-pause-caused-by-es/29103/3 "2015-09-11T09:53:58Z")

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any clues why this happens or any suggestions how I can diganose this?

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<div class="post-metadata">

**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:** [September 11, 2015, 10:08am UTC](https://discuss.elastic.co/t/very-long-gc-pause-caused-by-es/29103/4 "2015-09-11T10:08:16Z")

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Are you really running Java 6?  
What ES version are you on?

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<div class="post-metadata">

**Author:** ![makeyang](https://avatars.discourse-cdn.com/v4/letter/m/f05b48/32.png) [@makeyang](https://discuss.elastic.co/u/makeyang)\
**Post date:** [September 11, 2015, 10:19am UTC](https://discuss.elastic.co/t/very-long-gc-pause-caused-by-es/29103/5 "2015-09-11T10:19:29Z")

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yes, java6. 6u45  
es version: 0.90.2

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<div class="post-metadata">

**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:** [September 12, 2015, 12:52am UTC](https://discuss.elastic.co/t/very-long-gc-pause-caused-by-es/29103/6 "2015-09-12T00:52:04Z")

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Wow, that's really old and you should upgrade ASAP.

How much data in the cluster, how many indices, how many shards, how many nodes.

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<div class="post-metadata">

**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, 11:50pm UTC](https://discuss.elastic.co/t/very-long-gc-pause-caused-by-es/29103/7 "2017-07-05T23:50:38Z")

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