# If there are any config for garbage collection in Elastic search **URL:** \ **Category:** Elasticsearch\ **Created:** [October 25, 2018, 9:01am UTC](https://discuss.elastic.co/t/if-there-are-any-config-for-garbage-collection-in-elastic-search/153953 "2018-10-25T09:01:23Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![dinesh2](https://avatars.discourse-cdn.com/v4/letter/d/eb9ed0/32.png) [@dinesh2](https://discuss.elastic.co/u/dinesh2)\ **Post date:** [October 25, 2018, 9:01am UTC](https://discuss.elastic.co/t/if-there-are-any-config-for-garbage-collection-in-elastic-search/153953/1 "2018-10-25T09:01:23Z")
Please suggest if there are any config for garbage collection. Regards, Dinesh D ---
**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:** [October 25, 2018, 9:03am UTC](https://discuss.elastic.co/t/if-there-are-any-config-for-garbage-collection-in-elastic-search/153953/2 "2018-10-25T09:03:03Z")
Elasticsearch does its own GC. ---
**Author:** ![dinesh2](https://avatars.discourse-cdn.com/v4/letter/d/eb9ed0/32.png) [@dinesh2](https://discuss.elastic.co/u/dinesh2)\ **Post date:** [October 25, 2018, 9:20am UTC](https://discuss.elastic.co/t/if-there-are-any-config-for-garbage-collection-in-elastic-search/153953/3 "2018-10-25T09:20:48Z")
So we cant ableconfigure it right ? Regards, Dinesh D ---
**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:** [October 25, 2018, 9:26am UTC](https://discuss.elastic.co/t/if-there-are-any-config-for-garbage-collection-in-elastic-search/153953/4 "2018-10-25T09:26:28Z")
Why do you want to do that? ---
**Author:** ![dinesh2](https://avatars.discourse-cdn.com/v4/letter/d/eb9ed0/32.png) [@dinesh2](https://discuss.elastic.co/u/dinesh2)\ **Post date:** [October 25, 2018, 9:34am UTC](https://discuss.elastic.co/t/if-there-are-any-config-for-garbage-collection-in-elastic-search/153953/5 "2018-10-25T09:34:35Z")
My JVM memory goes almost 75% ---
**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:** [October 25, 2018, 9:52am UTC](https://discuss.elastic.co/t/if-there-are-any-config-for-garbage-collection-in-elastic-search/153953/6 "2018-10-25T09:52:57Z")
Then altering the GC settings for Elasticsearch will not solve anything, you just delay the problem and make it worse when it happens. Is the GC causing big problems? ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [October 25, 2018, 9:55am UTC](https://discuss.elastic.co/t/if-there-are-any-config-for-garbage-collection-in-elastic-search/153953/7 "2018-10-25T09:55:44Z")
Heap usage usually gets to 75% before GC is triggered. As long as it goes down after this it is generally a nice and healthy pattern. If you are constantly at or around 75% heap usage you may need to increase your heap size by scaling up or out. ---
**Author:** ![dinesh2](https://avatars.discourse-cdn.com/v4/letter/d/eb9ed0/32.png) [@dinesh2](https://discuss.elastic.co/u/dinesh2)\ **Post date:** [October 25, 2018, 11:35am UTC](https://discuss.elastic.co/t/if-there-are-any-config-for-garbage-collection-in-elastic-search/153953/8 "2018-10-25T11:35:03Z")
Thanks, I will increase the xmx and xms to 4 GB ---
**Author:** ![Admin\_Hack](https://avatars.discourse-cdn.com/v4/letter/a/13edae/32.png) [@Admin\_Hack](https://discuss.elastic.co/u/Admin_Hack)\ **Post date:** [October 25, 2018, 12:10pm UTC](https://discuss.elastic.co/t/if-there-are-any-config-for-garbage-collection-in-elastic-search/153953/9 "2018-10-25T12:10:40Z")
If you simply want to decrease the amount of memory that Elasticsearch is using, you need to change your heap size (via the HEAP\_SIZE environment variable). That controls the total memory allocated to Elasticsearch. Echoing what Binh said...try not to change the field-data settings unless you know what you are doing. You should not enable soft references for field-data, this is a very bad option. It causes excessive GC thrashing and is not needed (especially now that 1.0 has circuit breaker logic built in). Similarly, the time expiration on field-data is typically a poor option, since it unnecessarily thrashes the GC too. You can also increase the swap storage space or install add swap memory. 🙂 ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [November 22, 2018, 12:10pm UTC](https://discuss.elastic.co/t/if-there-are-any-config-for-garbage-collection-in-elastic-search/153953/10 "2018-11-22T12:10:41Z")
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