# Change JVM Heap Size with Logstash Helm Chart
**URL:** https://discuss.elastic.co/t/change-jvm-heap-size-with-logstash-helm-chart/149736
**Category:** Logstash
**Created:** [September 24, 2018, 8:42pm UTC](https://discuss.elastic.co/t/change-jvm-heap-size-with-logstash-helm-chart/149736 "2018-09-24T20:42:57Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@chenchik](https://discuss.elastic.co/u/chenchik)
#### Post date: [September 24, 2018, 8:42pm UTC](https://discuss.elastic.co/t/change-jvm-heap-size-with-logstash-helm-chart/149736/1 "2018-09-24T20:42:58Z")
I'm currently using the Logstash Kubernetes Helm chart, linked below:
> **[helm/charts](https://github.com/helm/charts/tree/master/incubator/logstash)**
>
> Curated applications for Kubernetes. Contribute to helm/charts development by creating an account on GitHub.
There doesn't seem to be a way to increase the JVM heap size using the values.yaml file.
I have also tried setting the environment variable `LS_JAVA_OPTS` as a parameter in the initial start up of the container by setting it's value to be `LS_JAVA_OPTS="-Xmx4g -Xms2g"`. I have been able to confirm that this environment variable is set by running `echo $LS_JAVA_OPTS`. Its values are not used in the start up of the of the JVM, reflected with this command:
```auto
bash-4.2$ ps -aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
logstash 1 191 4.2 6844236 661540 ? Ssl 20:31 1:11 /bin/java -Xms1g -Xmx1g -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -Djava.awt.headless=true -
```
I can't manually edit the file /usr/share/logstash/config/jvm.options because I need to be able to run logstash on start up of the container. Is there any other way to change the JVM Heap size option?
---
### Author:  [@yaauie](https://discuss.elastic.co/u/yaauie)
#### Post date: [September 24, 2018, 9:49pm UTC](https://discuss.elastic.co/t/change-jvm-heap-size-with-logstash-helm-chart/149736/2 "2018-09-24T21:49:22Z")
Although the `LS_JAVA_OPTS` environment variable is set, is it _exported_ from your shell to sub-shells?
Test with:
```auto
export | grep LS_JAVA_OPTS
```
If it doesn't show up there, you'll need to export it:
```auto
export LS_JAVA_OPTS
```
---
### Author:  [@chenchik](https://discuss.elastic.co/u/chenchik)
#### Post date: [September 24, 2018, 10:02pm UTC](https://discuss.elastic.co/t/change-jvm-heap-size-with-logstash-helm-chart/149736/3 "2018-09-24T22:02:43Z")
This is my output when I run the first command:
```auto
sh-4.2$ export | grep LS_JAVA_OPTS
export LS_JAVA_OPTS="-Xmx4g -Xms2g"
```
The way that I'm setting the environment variable is by using a values file that overrides the upstream helm chart. This is what I have in my values file.
```auto
config:
ls.java.opts: "-Xmx4g -Xms2g"
resources:
limits:
memory: 8Gi
requests:
memory: 8Gi
replicaCount: 2
```
So this environment variable gets created on creation of the container itself.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [October 22, 2018, 10:02pm UTC](https://discuss.elastic.co/t/change-jvm-heap-size-with-logstash-helm-chart/149736/4 "2018-10-22T22:02:45Z")
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