# How do I setup my cluster to maximize CPU util % while testing with Rally

**URL:** <https://discuss.elastic.co/t/how-do-i-setup-my-cluster-to-maximize-cpu-util-while-testing-with-rally/203726>\
**Category:** Elasticsearch\
**Tags:** rally\
**Created:** [October 15, 2019, 11:53pm UTC](https://discuss.elastic.co/t/how-do-i-setup-my-cluster-to-maximize-cpu-util-while-testing-with-rally/203726 "2019-10-15T23:53:35Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![dliappis](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dliappis/32/56174_2.png) [@dliappis](https://discuss.elastic.co/u/dliappis)\
**Post date:** [October 16, 2019, 6:15am UTC](https://discuss.elastic.co/t/how-do-i-setup-my-cluster-to-maximize-cpu-util-while-testing-with-rally/203726/2 "2019-10-16T06:15:04Z")

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Hello,

This question is a bit open ended without a definition of load (ingest? search?), other parameters like architecture, mappings etc. and understanding of what you want to achieve by benchmarking.

Please take a look at the [Using Rally to Get Your Elasticsearch Size Right webinar](https://www.elastic.co/webinars/using-rally-to-get-your-elasticsearch-cluster-size-right) and the [Benchmarking Elasticsearch with Rally](https://youtu.be/HriBY2zoChw) presentation linked in the [docs page](https://esrally.readthedocs.io/en/stable/faq.html#what-does-latency-and-service-time-mean-and-how-do-they-related-to-the-took-field-that-elasticsearch-returns) to get you started.

Dimitris

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