# Using G1C1 with Java 1.8.0\_191

**URL:** <https://discuss.elastic.co/t/using-g1c1-with-java-1-8-0-191/167443>\
**Category:** Elasticsearch\
**Created:** [February 7, 2019, 12:05pm UTC](https://discuss.elastic.co/t/using-g1c1-with-java-1-8-0-191/167443 "2019-02-07T12:05:14Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Zerobot](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/zerobot/32/48977_2.png) [@Zerobot](https://discuss.elastic.co/u/Zerobot)\
**Post date:** [February 7, 2019, 12:05pm UTC](https://discuss.elastic.co/t/using-g1c1-with-java-1-8-0-191/167443/1 "2019-02-07T12:05:14Z")

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Hi!

So I read that Elastic now supports using G1 Garbace Collectior. Is it also supported on for example Java 1.8.0\_191 or is JDK 10+ a total requirement?

Thanks in advance!

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**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:** [February 7, 2019, 12:43pm UTC](https://discuss.elastic.co/t/using-g1c1-with-java-1-8-0-191/167443/2 "2019-02-07T12:43:44Z")

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We only support G1GC with Java11 on Elasticsearch 6.5 and above. It is worth reading [this thread](https://discuss.elastic.co/t/where-can-i-find-info-on-the-status-of-g1gc-in-lucene-and-es/149526) on the topic and what it takes for us to declare something as supported as well as [this blog post](https://www.elastic.co/blog/a-heap-of-trouble).

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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:** [March 7, 2019, 12:43pm UTC](https://discuss.elastic.co/t/using-g1c1-with-java-1-8-0-191/167443/3 "2019-03-07T12:43:52Z")

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