# Logstash system config

**URL:** <https://discuss.elastic.co/t/logstash-system-config/136437>\
**Category:** Logstash\
**Created:** [June 19, 2018, 7:49am UTC](https://discuss.elastic.co/t/logstash-system-config/136437 "2018-06-19T07:49:06Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![MarcusCaepio](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/marcuscaepio/32/32458_2.png) [@MarcusCaepio](https://discuss.elastic.co/u/MarcusCaepio)\
**Post date:** [June 19, 2018, 7:49am UTC](https://discuss.elastic.co/t/logstash-system-config/136437/1 "2018-06-19T07:49:07Z")

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Hi all,  
I want to install Elastic + Logstash on several server  
I'm just wondering, if there is no "Important System Config" Part for logstash like there is for elastic:  
[https://www.elastic.co/guide/en/elasticsearch/reference/current/system-config.html](https://www.elastic.co/guide/en/elasticsearch/reference/current/system-config.html)

E.g. what should the headsize of logstash should be, when I have 64GB RAM und gave elastic already 32?

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**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\
**Post date:** [June 19, 2018, 8:42am UTC](https://discuss.elastic.co/t/logstash-system-config/136437/2 "2018-06-19T08:42:17Z")

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In most cases Logstash's default heap size should be enough, but it depends on your filters and the event rate.

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<div class="post-metadata">

**Author:** ![MarcusCaepio](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/marcuscaepio/32/32458_2.png) [@MarcusCaepio](https://discuss.elastic.co/u/MarcusCaepio)\
**Post date:** [June 28, 2018, 1:07pm UTC](https://discuss.elastic.co/t/logstash-system-config/136437/3 "2018-06-28T13:07:32Z")

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We are talking about 300.000 events per minute coming over UDP and going into a sepearate pipeline. Filtered by the so many cisco filter.

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<div class="post-metadata">

**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\
**Post date:** [June 29, 2018, 6:14am UTC](https://discuss.elastic.co/t/logstash-system-config/136437/4 "2018-06-29T06:14:47Z")

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Oh, that's quite a lot. There are no magic formulas for computing the needed heap size so it's something you'll have to tune.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 27, 2018, 6:28am UTC](https://discuss.elastic.co/t/logstash-system-config/136437/5 "2018-07-27T06:28:17Z")

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