# \_forcemerge multithreading / performance?

**URL:** <https://discuss.elastic.co/t/forcemerge-multithreading-performance/197573>\
**Category:** Elasticsearch\
**Created:** [August 30, 2019, 7:01pm UTC](https://discuss.elastic.co/t/forcemerge-multithreading-performance/197573 "2019-08-30T19:01:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jeroen1](https://avatars.discourse-cdn.com/v4/letter/j/47e85d/32.png) [@jeroen1](https://discuss.elastic.co/u/jeroen1)\
**Post date:** [August 30, 2019, 7:01pm UTC](https://discuss.elastic.co/t/forcemerge-multithreading-performance/197573/1 "2019-08-30T19:01:23Z")

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I mentioned that \_forcemerge uses only a single core. Is there an options to use multiple cores? If not: any tips of tricks to exploit massive core count for a \_forcemerge?

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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, 2019, 7:01pm UTC](https://discuss.elastic.co/t/forcemerge-multithreading-performance/197573/2 "2019-09-27T19:01:24Z")

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Closed on September 27, 2019, 7:01pm UTC

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