# Find out what causes long GC cycles on client node

**URL:** <https://discuss.elastic.co/t/find-out-what-causes-long-gc-cycles-on-client-node/45917>\
**Category:** Elasticsearch\
**Created:** [March 31, 2016, 10:27am UTC](https://discuss.elastic.co/t/find-out-what-causes-long-gc-cycles-on-client-node/45917 "2016-03-31T10:27:35Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![unknownunknown](https://avatars.discourse-cdn.com/v4/letter/u/4da419/32.png) [@unknownunknown](https://discuss.elastic.co/u/unknownunknown)\
**Post date:** [March 31, 2016, 4:43pm UTC](https://discuss.elastic.co/t/find-out-what-causes-long-gc-cycles-on-client-node/45917/2 "2016-03-31T16:43:05Z")

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This might be useful references:

> **[Understanding the Memory Pressure Indicator
	  	 | Elastic](https://www.elastic.co/blog/found-understanding-memory-pressure-indicator)**
>
> We all know memory is critical to Elasticsearch, but when should you add more? In the Found console we've included a memory pressure indicator so that you can easily check where your cluster is at in terms of memory usage and capacity. For those...

  

> **[Top 10 Elasticsearch Metrics to Watch](https://sematext.com/blog/top-10-elasticsearch-metrics-to-watch/)**
>
> Last updated on Jan 16, 2018. Elasticsearch is booming.  Together with Logstash, a tool for collecting and processing logs, and Kibana, a tool for searching and visualizing data in Elasticsearch (aka…

For me, it was almost always fielddata. Look for evictions in that and filterdata. \_node/stats and/or marvel or other monitor is your friend for troubleshooting this.

If you are not using doc\_values, it can help (at some indexing cost).

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