# Configuring Heap Size in CentOS
**URL:** https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432
**Category:** Elasticsearch
**Created:** [December 5, 2017, 10:25pm UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432 "2017-12-05T22:25:57Z")
**Posts on this page:** 18
**Page:** 1
### Author:  [@motts](https://discuss.elastic.co/u/motts)
#### Post date: [December 5, 2017, 10:25pm UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/1 "2017-12-05T22:25:57Z")
I am new to ELK and I am trying to figure out this heap problem I am having. I am trying to search the site here, but I get multiple results on how to set heap and on what parts of ELK need the heap size adjusted.
I am pretty sure that Elasticsearch is where I need to adjust the heap setting.
I modified /etc/sysconfig/elasticsearch with ES\_HEAP\_SIZE=4g, but when I check that in Kibana, it's not showing 4gb as heap total.
I also restarted the service for Elasticsearch and it still only showing about 800mb heap total.
Any help would be appreciated. Thank you.
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### Author:  [@zqc0512](https://discuss.elastic.co/u/zqc0512)
#### Post date: [December 6, 2017, 12:50am UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/2 "2017-12-06T00:50:57Z")
jvm.options file to update this.
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### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [December 6, 2017, 1:06am UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/3 "2017-12-06T01:06:46Z")
What version are you on?
Also we’ve renamed ELK to the Elastic Stack, otherwise Beats and APM feel left out! 😉
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### Author:  [@motts](https://discuss.elastic.co/u/motts)
#### Post date: [December 6, 2017, 2:14pm UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/4 "2017-12-06T14:14:47Z")
I am using Version 2.4. I will try to use Elastic Stack in the future 😄
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### Author:  [@motts](https://discuss.elastic.co/u/motts)
#### Post date: [December 6, 2017, 2:19pm UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/5 "2017-12-06T14:19:17Z")
I am not seeing a jvm.options file. I found a java.conf file with these lines in it:
```
# Options to pass to the java interpreter
JAVACMD_OPTS=
```
Is this what I need?
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### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [December 6, 2017, 9:17pm UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/6 "2017-12-06T21:17:18Z")
Is there a reason you are using such an older version? Current is 6.0.0.
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### Author:  [@motts](https://discuss.elastic.co/u/motts)
#### Post date: [December 6, 2017, 9:45pm UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/7 "2017-12-06T21:45:26Z")
The version we use is out of my control. I was handed this project because the guy who was working on it is no longer with us, so I am trying to study up on his stuff. I am not authorized to upgrade Elastic Stack until we get it 100% functional. Not my call on this.
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### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [December 6, 2017, 9:54pm UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/8 "2017-12-06T21:54:11Z")
OK, then check out [https://www.elastic.co/guide/en/elasticsearch/reference/2.4/setup-configuration.html](https://www.elastic.co/guide/en/elasticsearch/reference/2.4/setup-configuration.html)
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### Author:  [@motts](https://discuss.elastic.co/u/motts)
#### Post date: [December 13, 2017, 6:16pm UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/9 "2017-12-13T18:16:42Z")
I checked that out and made a change to /etc/init.d/logstash , but the Kibana Status page is not displaying the amount I set it to. Do you have any other suggestions?
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### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [December 13, 2017, 9:01pm UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/10 "2017-12-13T21:01:51Z")
Please don't change the init file, it'll only cause problems later 🙂
You should use `/etc/default/elasticsearch` - [https://www.elastic.co/guide/en/elasticsearch/reference/2.4/setup-service.html#\_debian\_ubuntu](https://www.elastic.co/guide/en/elasticsearch/reference/2.4/setup-service.html#_debian_ubuntu)
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### Author:  [@motts](https://discuss.elastic.co/u/motts)
#### Post date: [December 13, 2017, 9:51pm UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/11 "2017-12-13T21:51:11Z")
There isn't elasticsearch at /etc/default/
Also, I am using CentOS 6.8
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### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [December 13, 2017, 10:35pm UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/12 "2017-12-13T22:35:46Z")
If you scroll down a bit it has instructions for RPM installs as well - [https://www.elastic.co/guide/en/elasticsearch/reference/2.4/setup-service.html#\_rpm\_based\_distributions](https://www.elastic.co/guide/en/elasticsearch/reference/2.4/setup-service.html#_rpm_based_distributions) 🙂
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### Author:  [@motts](https://discuss.elastic.co/u/motts)
#### Post date: [December 14, 2017, 2:54pm UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/13 "2017-12-14T14:54:13Z")
Ah ok. I am still trying to figure out CentOS, so thanks for at least appearing to be understanding 😄
I modified /etc/sysconfig/elasticsearch with
ES\_HEAP\_SIZE=4g
Then restarted elasticsearch, but Kibana is still showing significantly less Heap Total at the Status screen.
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### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [December 14, 2017, 9:48pm UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/14 "2017-12-14T21:48:12Z")
That's Kibana's resource use, not Elasticsearch.
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### Author:  [@motts](https://discuss.elastic.co/u/motts)
#### Post date: [December 14, 2017, 10:07pm UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/15 "2017-12-14T22:07:10Z")
Ah I was thinking that it was displaying the heap size of Elasticsearch. So I've probably had it right this whole time lol whoops \>\_\>
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### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [December 14, 2017, 10:11pm UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/16 "2017-12-14T22:11:05Z")
Oh well, at least you know know a bit more about the stack 😃
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### Author:  [@zqc0512](https://discuss.elastic.co/u/zqc0512)
#### Post date: [December 15, 2017, 1:24am UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/17 "2017-12-15T01:24:08Z")
see the nodes....
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [January 12, 2018, 1:24am UTC](https://discuss.elastic.co/t/configuring-heap-size-in-centos/110432/18 "2018-01-12T01:24:46Z")
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