# Elasticsearch diagnostic

**URL:** https://discuss.elastic.co/t/elasticsearch-diagnostic/25138
**Category:** Elasticsearch
**Created:** [July 8, 2015, 11:00am UTC](https://discuss.elastic.co/t/elasticsearch-diagnostic/25138 "2015-07-08T11:00:59Z")
**Posts on this page:** 7
**Page:** 1

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### Author: ![Smasell](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/smasell/32/43483_2.png) [@Smasell](https://discuss.elastic.co/u/Smasell)
#### Post date: [July 8, 2015, 11:00am UTC](https://discuss.elastic.co/t/elasticsearch-diagnostic/25138/1 "2015-07-08T11:00:59Z")

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Hi!!  
ES periodically crashed under high load.  
I wonder how to diagnose ES's problems? Is there any ways or some tips for using ES?

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### 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: [July 8, 2015, 11:10am UTC](https://discuss.elastic.co/t/elasticsearch-diagnostic/25138/2 "2015-07-08T11:10:33Z")

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Check your logs for OOM or long GC.

What version are you on? What is "high load"? What is causing the high load? Are you monitoring Elasticsearch?

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### Author: ![nellicus](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nellicus/32/51566_2.png) [@nellicus](https://discuss.elastic.co/u/nellicus)
#### Post date: [July 8, 2015, 1:05pm UTC](https://discuss.elastic.co/t/elasticsearch-diagnostic/25138/3 "2015-07-08T13:05:08Z")

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You can install Marvel

```
bin/plugin -i elasticsearch/marvel/latest

```

and keep an eye on memory consumption, fielddata and filter cache size and evictions and other metrics

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### Author: ![Smasell](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/smasell/32/43483_2.png) [@Smasell](https://discuss.elastic.co/u/Smasell)
#### Post date: [July 8, 2015, 1:19pm UTC](https://discuss.elastic.co/t/elasticsearch-diagnostic/25138/4 "2015-07-08T13:19:52Z")

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@nellicus  
Is it free?

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### Author: ![nellicus](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nellicus/32/51566_2.png) [@nellicus](https://discuss.elastic.co/u/nellicus)
#### Post date: [July 8, 2015, 1:21pm UTC](https://discuss.elastic.co/t/elasticsearch-diagnostic/25138/5 "2015-07-08T13:21:39Z")

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Only in Development environment

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### Author: ![otisg](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/otisg/32/492_2.png) [@otisg](https://discuss.elastic.co/u/otisg)
#### Post date: [July 9, 2015, 2:52am UTC](https://discuss.elastic.co/t/elasticsearch-diagnostic/25138/6 "2015-07-09T02:52:26Z")

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You can also use [http://sematext.com/spm/integrations/elasticsearch-monitoring.html](http://sematext.com/spm/integrations/elasticsearch-monitoring.html) - there is a free-forever plan without node limits, even for production.

Otis

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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, 12:02am UTC](https://discuss.elastic.co/t/elasticsearch-diagnostic/25138/7 "2017-07-06T00:02:41Z")

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