# WARN Monitor.jvm

**URL:** <https://discuss.elastic.co/t/warn-monitor-jvm/27648>\
**Category:** Elasticsearch\
**Created:** [August 19, 2015, 8:27am UTC](https://discuss.elastic.co/t/warn-monitor-jvm/27648 "2015-08-19T08:27:29Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![sunilmchaudhari](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sunilmchaudhari/32/9475_2.png) [@sunilmchaudhari](https://discuss.elastic.co/u/sunilmchaudhari)\
**Post date:** [August 19, 2015, 8:27am UTC](https://discuss.elastic.co/t/warn-monitor-jvm/27648/1 "2015-08-19T08:27:29Z")

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Hello,  
I am facing below issue in elasticsearch indexing. It seems indexing has got slower. There is difference of around 5-7 hrs in actual log time and the time it gets stored in DB.

ES logs says below in log file.

[2015-08-19 11:21:53,846][WARN][monitor.jvm] [presit-data-Node-2] [gc][old][1407][304] duration [13.2s], collections [1]/[13.5s], total [13.2s]/[1h], memory [998.3mb]-\>[995.6mb]/[1007.3mb], all\_pools {[young] [133.1mb]-\>[133.1mb]/[133.1mb]}{[survivor] [7.6mb]-\>[4.9mb]/[16.6mb]}{[old] [857.6mb]-\>[857.6mb]/[857.6mb]}

I cant understand what its mean?  
I tried following but it didn't solve the issue.

1. heap space increased to 3 GB. Still it shows 1 GB heap size on node diagnostic through elastic-HQ?
2. sudo swapoff -a

Please guide me on this.

thanks  
Sunil Chaudhari.

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**Author:** ![sunilmchaudhari](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sunilmchaudhari/32/9475_2.png) [@sunilmchaudhari](https://discuss.elastic.co/u/sunilmchaudhari)\
**Post date:** [August 20, 2015, 10:44am UTC](https://discuss.elastic.co/t/warn-monitor-jvm/27648/2 "2015-08-20T10:44:46Z")

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Hi,  
Can anybody reply on this?  
Please tell me what does it mean and what might be the reason?

thanks  
Sunil

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**Author:** ![abhijat](https://avatars.discourse-cdn.com/v4/letter/a/9de0a6/32.png) [@abhijat](https://discuss.elastic.co/u/abhijat)\
**Post date:** [August 26, 2015, 7:30pm UTC](https://discuss.elastic.co/t/warn-monitor-jvm/27648/3 "2015-08-26T19:30:22Z")

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This is old generation GC message. It took 13.2 seconds to clean your old gen. It also seems like your old generation is full evern after collection -- [old] [857.6mb]-\>[857.6mb]/[857.6mb].

How did you increase the heap? Did you do it like ES\_HEAP\_SIZE=1g? or something else?

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**Author:** ![sunilmchaudhari](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sunilmchaudhari/32/9475_2.png) [@sunilmchaudhari](https://discuss.elastic.co/u/sunilmchaudhari)\
**Post date:** [August 27, 2015, 8:39am UTC](https://discuss.elastic.co/t/warn-monitor-jvm/27648/4 "2015-08-27T08:39:52Z")

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Hi Abhijit,  
Thanks for the reply.  
I have increased heap size by editing file /etc/sysconfig/elasticsearch. It did not help but at least I could see heap size change from ES-HQ diagnostic page.  
setting parameter ES\_HEAP\_SIZE=1g had no effect on heap size.  
I just made some changes in master/data node and cluster is working, but I fear it will arise again.

br,  
Sunil

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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 5, 2017, 11:53pm UTC](https://discuss.elastic.co/t/warn-monitor-jvm/27648/5 "2017-07-05T23:53:32Z")

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