# Installation java

**URL:** <https://discuss.elastic.co/t/installation-java/1191>\
**Category:** Elasticsearch\
**Created:** [May 22, 2015, 7:51pm UTC](https://discuss.elastic.co/t/installation-java/1191 "2015-05-22T19:51:29Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Stra](https://avatars.discourse-cdn.com/v4/letter/s/f07891/32.png) [@Stra](https://discuss.elastic.co/u/Stra)\
**Post date:** [May 22, 2015, 7:51pm UTC](https://discuss.elastic.co/t/installation-java/1191/1 "2015-05-22T19:51:29Z")

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Hi,  
I've installed JRE and JDK 8.0\_45  
After running the elasticsearch.bat file, i got this message in the command line:  
[WARN] [bootstrap] jvm uses the client vm, make sure to run 'java' with the server vm for best performance by adding '\_server' to the command line

What does it mean?

Best regards

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**Author:** ![Jason\_Wee](https://avatars.discourse-cdn.com/v4/letter/j/7ea924/32.png) [@Jason\_Wee](https://discuss.elastic.co/u/Jason_Wee)\
**Post date:** [May 25, 2015, 1:03pm UTC](https://discuss.elastic.co/t/installation-java/1191/2 "2015-05-25T13:03:23Z")

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check java version if elasticsearch is using the jdk version. [Installation | Elasticsearch Guide [8.11] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/current/_installation.html)

> $ java -version  
> java version "1.8.0\_45"  
> Java(TM) SE Runtime Environment (build 1.8.0\_45-b14)  
> Java HotSpot(TM) 64-Bit **Server** VM (build 25.45-b02, mixed mode)

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**Author:** ![Stra](https://avatars.discourse-cdn.com/v4/letter/s/f07891/32.png) [@Stra](https://discuss.elastic.co/u/Stra)\
**Post date:** [June 5, 2015, 3:30pm UTC](https://discuss.elastic.co/t/installation-java/1191/3 "2015-06-05T15:30:42Z")

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Hi Jason\_Wee,  
This is what i obtain while checking java version:  
java version "1.8.0\_45"  
Java(TM) SE Runtime Environment (build 1.8.0\_45-b15)  
Java HotSpot(TM) Client VM (build 25.45-b02, mixed mode, sharing)

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**Author:** ![Jason\_Wee](https://avatars.discourse-cdn.com/v4/letter/j/7ea924/32.png) [@Jason\_Wee](https://discuss.elastic.co/u/Jason_Wee)\
**Post date:** [June 6, 2015, 3:19pm UTC](https://discuss.elastic.co/t/installation-java/1191/4 "2015-06-06T15:19:46Z")

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yea, client vm, find out how to use the server vm.

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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, 12:09am UTC](https://discuss.elastic.co/t/installation-java/1191/5 "2017-07-06T00:09:10Z")

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