# Question about CPU Cores **URL:** \ **Category:** Elasticsearch\ **Created:** [November 15, 2011, 6:19pm UTC](https://discuss.elastic.co/t/question-about-cpu-cores/5879 "2011-11-15T18:19:55Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![electic](https://avatars.discourse-cdn.com/v4/letter/e/ecccb3/32.png) [@electic](https://discuss.elastic.co/u/electic)\ **Post date:** [November 15, 2011, 6:19pm UTC](https://discuss.elastic.co/t/question-about-cpu-cores/5879/1 "2011-11-15T18:19:55Z")
Hi, First off, thanks for everyone that is helping me. I am new to ES and Java. I have a question about CPU cores in a cluster. I noticed when ES peaks, it seems to max out only 4 cores of the machine. Machine 1 has 8 cores and Machine 2 in the cluster has only 4 cores. Does ES use the lowest common denominator across the cluster? If not, is there a way to have ES use all the cores of the available machine? ---
**Author:** ![kimchy](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kimchy/32/44952_2.png) [@kimchy](https://discuss.elastic.co/u/kimchy)\ **Post date:** [November 16, 2011, 2:08pm UTC](https://discuss.elastic.co/t/question-about-cpu-cores/5879/2 "2011-11-16T14:08:52Z")
No, there is no specific utilization of a subset of cores by ES, it will use what it has. On Tue, Nov 15, 2011 at 8:19 PM, electic [electic@gmail.com](mailto:electic@gmail.com) wrote: > Hi, > > First off, thanks for everyone that is helping me. I am new to ES and > Java. I have a question about CPU cores in a cluster. I noticed when > ES peaks, it seems to max out only 4 cores of the machine. Machine 1 > has 8 cores and Machine 2 in the cluster has only 4 cores. Does ES use > the lowest common denominator across the cluster? > > If not, is there a way to have ES use all the cores of the available > machine? ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 3:48am UTC](https://discuss.elastic.co/t/question-about-cpu-cores/5879/3 "2017-07-06T03:48:25Z")