# Memory usage question

**URL:** <https://discuss.elastic.co/t/memory-usage-question/7888>\
**Category:** Elasticsearch\
**Created:** [May 28, 2012, 12:03pm UTC](https://discuss.elastic.co/t/memory-usage-question/7888 "2012-05-28T12:03:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Pavel\_Dvorak](https://avatars.discourse-cdn.com/v4/letter/p/b9e5f3/32.png) [@Pavel\_Dvorak](https://discuss.elastic.co/u/Pavel_Dvorak)\
**Post date:** [May 28, 2012, 12:03pm UTC](https://discuss.elastic.co/t/memory-usage-question/7888/1 "2012-05-28T12:03:23Z")

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hi  
I have set this:  
ES\_JAVA\_OPTS=-Xmx512m

ES\_MIN\_MEM=512m

ES\_MAX\_MEM=512m

ES\_HEAP\_SIZE=512m  
and mem lock all = 1

So I wanted it to use not much memory because the number of queries is low  
now.  
But when i run top, it says it uses 1.5 GB  
It's ok or I have done something wrong?

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**Author:** ![Eric\_Jain](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/eric_jain/32/834_2.png) [@Eric\_Jain](https://discuss.elastic.co/u/Eric_Jain)\
**Post date:** [May 29, 2012, 3:52pm UTC](https://discuss.elastic.co/t/memory-usage-question/7888/2 "2012-05-29T15:52:14Z")

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On May 28, 5:03 am, Pavel Dvorak [pavel.dvorak.w...@gmail.com](mailto:pavel.dvorak.w...@gmail.com) wrote:

> hi  
> I have set this:  
> ES\_JAVA\_OPTS=-Xmx512m
> 
> ES\_MIN\_MEM=512m
> 
> ES\_MAX\_MEM=512m
> 
> ES\_HEAP\_SIZE=512m  
> and mem lock all = 1
> 
> So I wanted it to use not much memory because the number of queries is low  
> now.  
> But when i run top, it says it uses 1.5 GB  
> It's ok or I have done something wrong?

max heap size \< max memory used (or reported by top)

You can use jconsole or bigdesk to see what's going on.

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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 6, 2017, 3:26am UTC](https://discuss.elastic.co/t/memory-usage-question/7888/3 "2017-07-06T03:26:38Z")

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Closed on July 6, 2017, 3:26am UTC