# ES 6.8.23 too many Full GC

**URL:** <https://discuss.elastic.co/t/es-6-8-23-too-many-full-gc/312478>\
**Category:** Elasticsearch\
**Created:** [August 19, 2022, 2:37pm UTC](https://discuss.elastic.co/t/es-6-8-23-too-many-full-gc/312478 "2022-08-19T14:37:51Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Andrey\_Tyutyunov](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/andrey_tyutyunov/32/98571_2.png) [@Andrey\_Tyutyunov](https://discuss.elastic.co/u/Andrey_Tyutyunov)\
**Post date:** [August 19, 2022, 2:37pm UTC](https://discuss.elastic.co/t/es-6-8-23-too-many-full-gc/312478/1 "2022-08-19T14:37:51Z")

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Good day!

Version 6.8.23  
3 nodes, 26GB heap per node, 64GB RAM on each node  
java 14  
Indices: 49  
Documents 516,257,116  
Disk Usage 872.0 GB  
Primary Shards 165  
Replica Shards 165  
Search Rate (/s) ~ 750 /s (total shards)  
Indexing Rate (/s) ~ 200 /s (total shards)

On garbage collector stat I see strange situation - too many cases Full GC, below Full GC on 2 hrs 24 min 10 sec

### Full GC stats

| Full GC Count | 12328 |
| --- | --- |
| Full GC reclaimed | 7.81 gb |
| Full GC total time | 40 sec 782 ms |
| Full GC avg time | 3.31 ms |
| Full GC avg time std dev | 2.60 ms |
| Full GC min/max time | 0.466 ms / 15.6 ms |
| Full GC Interval avg | 701 ms |

It's okey? Looks very strange. I have no see any other problem, elasticsearch log without errors / warnings / causes, response time - search time - index time no any problems, CPU usage on any node 20-30%, each node on deducated server.

 ![Снимок экрана 2022-08-19 в 19.32.49](https://us1.discourse-cdn.com/elastic/original/3X/1/f/1f470c0a3b3d07a0b362db6ed5a907a79e3c9cb8.jpeg)  
 ![Снимок экрана 2022-08-19 в 19.32.42](https://us1.discourse-cdn.com/elastic/original/3X/a/f/af353818d16a33148813f7207cc3de7dd7334cfe.jpeg)

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**Author:** ![Andrey\_Tyutyunov](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/andrey_tyutyunov/32/98571_2.png) [@Andrey\_Tyutyunov](https://discuss.elastic.co/u/Andrey_Tyutyunov)\
**Post date:** [August 19, 2022, 3:02pm UTC](https://discuss.elastic.co/t/es-6-8-23-too-many-full-gc/312478/2 "2022-08-19T15:02:44Z")

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I think I found answer - this is look like bug in GC log visualizer for second rotated log, first gc log looks similar but all marks as Young GC, correct me please if I'm wrong

 ![Снимок экрана 2022-08-19 в 20.01.49](https://us1.discourse-cdn.com/elastic/original/3X/4/6/4623c62154bddaeac668d2ccf04b1169015732f5.jpeg)

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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:** [August 22, 2022, 12:29am UTC](https://discuss.elastic.co/t/es-6-8-23-too-many-full-gc/312478/3 "2022-08-22T00:29:53Z")

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Your GC looks pretty good, it's running and cleaning heap as it should be.

> [@Andrey\_Tyutyunov](#):
>
> Version 6.8.23

Please upgrade 6.8 is very much past [EOL](https://www.elastic.co/support/eol) and there have been numerous improvements in newer versions that will help your situationm

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<div class="post-metadata">

**Author:** ![Andrey\_Tyutyunov](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/andrey_tyutyunov/32/98571_2.png) [@Andrey\_Tyutyunov](https://discuss.elastic.co/u/Andrey_Tyutyunov)\
**Post date:** [August 30, 2022, 3:55am UTC](https://discuss.elastic.co/t/es-6-8-23-too-many-full-gc/312478/4 "2022-08-30T03:55:31Z")

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Thank you, upgrade in progress - the cluster uses in heavy load project as main store and need in refactor code and reorganize DB

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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:** [September 27, 2022, 3:56am UTC](https://discuss.elastic.co/t/es-6-8-23-too-many-full-gc/312478/5 "2022-09-27T03:56:23Z")

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