# Best compression codec

**URL:** <https://discuss.elastic.co/t/best-compression-codec/299869>\
**Category:** Elasticsearch\
**Created:** [March 16, 2022, 2:29pm UTC](https://discuss.elastic.co/t/best-compression-codec/299869 "2022-03-16T14:29:15Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Rollup\_eval](https://avatars.discourse-cdn.com/v4/letter/r/e274bd/32.png) [@Rollup\_eval](https://discuss.elastic.co/u/Rollup_eval)\
**Post date:** [March 16, 2022, 2:29pm UTC](https://discuss.elastic.co/t/best-compression-codec/299869/1 "2022-03-16T14:29:15Z")

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Hello,

I'm using Elasticsearch 7.10.2.  
I have created a new index with index.codec: best\_compression in its settings.

Is the best\_compression for this new index taken on account during hot phase ? (or only during the warm phase after force merge)

Thank you

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<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [March 16, 2022, 2:47pm UTC](https://discuss.elastic.co/t/best-compression-codec/299869/2 "2022-03-16T14:47:36Z")

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Every new segment will use this codec.

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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:** [April 13, 2022, 2:48pm UTC](https://discuss.elastic.co/t/best-compression-codec/299869/3 "2022-04-13T14:48:10Z")

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