# CPU usage High **URL:** \ **Category:** Elasticsearch\ **Created:** [December 28, 2015, 5:05am UTC](https://discuss.elastic.co/t/cpu-usage-high/38015 "2015-12-28T05:05:38Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![tommoholmes10](https://avatars.discourse-cdn.com/v4/letter/t/ed8c4c/32.png) [@tommoholmes10](https://discuss.elastic.co/u/tommoholmes10)\ **Post date:** [December 28, 2015, 5:05am UTC](https://discuss.elastic.co/t/cpu-usage-high/38015/1 "2015-12-28T05:05:38Z")
Hai I run my elasticsearch in version 2.1 I run in server with CPU 2GB. and I have 2 nodes in my server. I set ES\_HEAP\_SIZE=256m in my nodes but when I check use top I get USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 14784 elastic+ 20 0 2761876 451960 11692 S 74.6 22.1 57:50.59 java 14636 tomo 20 0 2762376 512980 16704 S 72.6 25.0 56:47.55 java please help me ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [December 28, 2015, 5:18am UTC](https://discuss.elastic.co/t/cpu-usage-high/38015/2 "2015-12-28T05:18:24Z")
Add more heap! How much data in the cluster? ---
**Author:** ![tommoholmes10](https://avatars.discourse-cdn.com/v4/letter/t/ed8c4c/32.png) [@tommoholmes10](https://discuss.elastic.co/u/tommoholmes10)\ **Post date:** [December 28, 2015, 5:20am UTC](https://discuss.elastic.co/t/cpu-usage-high/38015/3 "2015-12-28T05:20:32Z")
add more heap? so how much I set my heap I crawl website an I add to ES ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [December 28, 2015, 5:44am UTC](https://discuss.elastic.co/t/cpu-usage-high/38015/4 "2015-12-28T05:44:08Z")
> [@tommoholmes10](#): > > I set ES\_HEAP\_SIZE=256m in my nodes Change that. ---
**Author:** ![tommoholmes10](https://avatars.discourse-cdn.com/v4/letter/t/ed8c4c/32.png) [@tommoholmes10](https://discuss.elastic.co/u/tommoholmes10)\ **Post date:** [December 28, 2015, 5:49am UTC](https://discuss.elastic.co/t/cpu-usage-high/38015/5 "2015-12-28T05:49:50Z")
when I set to ES\_HEAP\_SIZE=1gb Now I get 114% and 60% CPU usage ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 5, 2017, 11:28pm UTC](https://discuss.elastic.co/t/cpu-usage-high/38015/6 "2017-07-05T23:28:22Z")