# Error occurred during initialization of VM Could not reserve enough space for 1048576KB object heap - ElasticSearch

**URL:** <https://discuss.elastic.co/t/error-occurred-during-initialization-of-vm-could-not-reserve-enough-space-for-1048576kb-object-heap-elasticsearch/33999>\
**Category:** Elasticsearch\
**Created:** [November 6, 2015, 2:50pm UTC](https://discuss.elastic.co/t/error-occurred-during-initialization-of-vm-could-not-reserve-enough-space-for-1048576kb-object-heap-elasticsearch/33999 "2015-11-06T14:50:49Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Prewin](https://avatars.discourse-cdn.com/v4/letter/p/d6d6ee/32.png) [@Prewin](https://discuss.elastic.co/u/Prewin)\
**Post date:** [November 6, 2015, 2:50pm UTC](https://discuss.elastic.co/t/error-occurred-during-initialization-of-vm-could-not-reserve-enough-space-for-1048576kb-object-heap-elasticsearch/33999/1 "2015-11-06T14:50:49Z")

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Goto ElasticSearch bin directory.  
Eg:\ElasticSearch\elasticsearch-2.0.0\bin

Right click elasticsearch.in.bat -\>edit

change

if "%ES\_MAX\_MEM%" == "" (  
set ES\_MAX\_MEM=1g  
)

to

if "%ES\_MAX\_MEM%" == "" (  
set ES\_MAX\_MEM=512m  
)

save & close.

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**Author:** ![gauravguru](https://avatars.discourse-cdn.com/v4/letter/g/a9adbd/32.png) [@gauravguru](https://discuss.elastic.co/u/gauravguru)\
**Post date:** [February 21, 2017, 12:43pm UTC](https://discuss.elastic.co/t/error-occurred-during-initialization-of-vm-could-not-reserve-enough-space-for-1048576kb-object-heap-elasticsearch/33999/2 "2017-02-21T12:43:16Z")

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Hi,

I faced same issue.

To resolve the issue:

In environment variable add new variable

![](https://us1.discourse-cdn.com/elastic/original/2X/b/bd193fa9e930c8b384e172058a79dfc23fe1295d.png)

Hope it helps.

Thanks,  
Gaurav

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**Author:** ![Praful\_Kharche](https://avatars.discourse-cdn.com/v4/letter/p/e47c2d/32.png) [@Praful\_Kharche](https://discuss.elastic.co/u/Praful_Kharche)\
**Post date:** [May 19, 2017, 4:58am UTC](https://discuss.elastic.co/t/error-occurred-during-initialization-of-vm-could-not-reserve-enough-space-for-1048576kb-object-heap-elasticsearch/33999/3 "2017-05-19T04:58:26Z")

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# Installation for ElasticSearch

1. Comment entry in C:\ELK\elasticsearch-5.4.0\elasticsearch-5.4.0\config\jvm.options

#-Xms2g  
#-Xmx2g

1. set ES\_JAVA\_OPTS as below in elasticsearch.bat  
set ES\_JAVA\_OPTS = "-Xms512m -Xmx512m"

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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 5, 2017, 10:00pm UTC](https://discuss.elastic.co/t/error-occurred-during-initialization-of-vm-could-not-reserve-enough-space-for-1048576kb-object-heap-elasticsearch/33999/4 "2017-07-05T22:00:16Z")

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