# Increase Logstash Java heap-size on Ubuntu 16.10

**URL:** https://discuss.elastic.co/t/increase-logstash-java-heap-size-on-ubuntu-16-10/120825
**Category:** Logstash
**Created:** [February 21, 2018, 11:34am UTC](https://discuss.elastic.co/t/increase-logstash-java-heap-size-on-ubuntu-16-10/120825 "2018-02-21T11:34:31Z")
**Posts on this page:** 3
**Page:** 1

<div class="post-metadata">

### Author: ![Ryan\_Grannell](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ryan_grannell/32/41712_2.png) [@Ryan\_Grannell](https://discuss.elastic.co/u/Ryan_Grannell)
#### Post date: [February 21, 2018, 11:34am UTC](https://discuss.elastic.co/t/increase-logstash-java-heap-size-on-ubuntu-16-10/120825/1 "2018-02-21T11:34:31Z")

</div>

Hi,

We're currently running into problems where our Logstash VM is hitting the Java heap-size limit, despite having a large amount of free RAM on the VM.

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/8/3/8382fd80e965f8070054ec94b31aa175d2c75191.png)

```auto
{"level":"ERROR","loggerName":"logstash.filters.grok","timeMillis":1519212709312,"thread":"Ruby-0-Thread-23: /usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-grok-4.0.1/lib/logstash/filters/grok/timeout_enforcer.rb:33","logEvent":{"message":"Error while attempting to check/cancel excessively long grok patterns","message":"Java heap space","class":"Java::JavaLang::OutOfMemoryError","backtrace":[]}}
{"level":"ERROR","loggerName":"logstash.filters.grok","timeMillis":1519212711483,"thread":"Ruby-0-Thread-13: /usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-grok-4.0.1/lib/logstash/filters/grok/timeout_enforcer.rb:33","logEvent":{"message":"Error while attempting to check/cancel excessively long grok patterns","message":"Java heap space","class":"Java::JavaLang::OutOfMemoryError","backtrace":[]}}
{"level":"ERROR","loggerName":"logstash.filters.grok","timeMillis":1519212713736,"thread":"Ruby-0-Thread-90: (eval):8156","logEvent":{"message":"Error while attempting to check/cancel excessively long grok patterns","message":"Java heap space","class":"Java::JavaLang::OutOfMemoryError","backtrace":[]}}
{"level":"ERROR","loggerName":"logstash.filters.grok","timeMillis":1519212715978,"thread":"Ruby-0-Thread-32: /usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-grok-4.0.1/lib/logstash/filters/grok/timeout_enforcer.rb:33","logEvent":{"message":"Error while attempting to check/cancel excessively long grok patterns","message":"Java heap space","class":"Java::JavaLang::OutOfMemoryError","backtrace":[]}}
{"level":"ERROR","loggerName":"logstash.filters.grok","timeMillis":1519212718147,"thread":"Ruby-0-Thread-93: (eval):8261","logEvent":{"message":"Error while attempting to check/cancel excessively long grok patterns","message":"Java heap space","class":"Java::JavaLang::OutOfMemoryError","backtrace":[]}}

```

Is there an easy way to increase the system-wide JVM heap-size for Logstash? For example, are there environmental variables that can be set to do this?

Regards,  
Ryan

---

<div class="post-metadata">

### Author: ![Ryan\_Grannell](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ryan_grannell/32/41712_2.png) [@Ryan\_Grannell](https://discuss.elastic.co/u/Ryan_Grannell)
#### Post date: [February 21, 2018, 11:35am UTC](https://discuss.elastic.co/t/increase-logstash-java-heap-size-on-ubuntu-16-10/120825/2 "2018-02-21T11:35:48Z")

</div>

Sorry, just found the answer.

> [@Changing Logstash Heap Size](https://discuss.elastic.co/t/changing-logstash-heap-size/69542/3):
>
> How do i use LS\_JAVA\_OPTS for multiple flags? do you have an example?

---

<div class="post-metadata">

### Author: ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)
#### Post date: [March 21, 2018, 11:35am UTC](https://discuss.elastic.co/t/increase-logstash-java-heap-size-on-ubuntu-16-10/120825/3 "2018-03-21T11:35:49Z")

</div>

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.