# Hardware requirements for Elasticsearch 6.3.1 **URL:** \ **Category:** Elasticsearch\ **Created:** [July 20, 2018, 2:38pm UTC](https://discuss.elastic.co/t/hardware-requirements-for-elasticsearch-6-3-1/140919 "2018-07-20T14:38:53Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![adrwer](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/adrwer/32/35629_2.png) [@adrwer](https://discuss.elastic.co/u/adrwer)\ **Post date:** [July 20, 2018, 2:38pm UTC](https://discuss.elastic.co/t/hardware-requirements-for-elasticsearch-6-3-1/140919/1 "2018-07-20T14:38:53Z")
I'm new to elasticsearch and I've installed the .tar.gz package on a Rhel7.5 instance on Amazon Web Services with a RAM of 1GB and volume of 10GB but when I run it with this command "./bin/elasticsearch" I get this error: `Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit\_memory(0x00000000c5330000, 986513408, 0) failed; error='Cannot allocate memory' (errno=12) # # There is insufficient memory for the Java Runtime Environment to continue. # Native memory allocation (mmap) failed to map 986513408 bytes for committing reserved memory. # An error report file with more information is saved as: # logs/hs\_err\_pid29069.log` What could be the problem? Please assist. ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [July 20, 2018, 3:48pm UTC](https://discuss.elastic.co/t/hardware-requirements-for-elasticsearch-6-3-1/140919/2 "2018-07-20T15:48:53Z")
Elasticsearch by default deploys with a 1GB heap, which you do not have enough RAM for. You either need to get a larger host or reduce the heap size in the `jvm.options` file. ---
**Author:** ![adrwer](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/adrwer/32/35629_2.png) [@adrwer](https://discuss.elastic.co/u/adrwer)\ **Post date:** [July 21, 2018, 7:40am UTC](https://discuss.elastic.co/t/hardware-requirements-for-elasticsearch-6-3-1/140919/3 "2018-07-21T07:40:09Z")
What size do I reduce the heap size to considering my hardware specs? ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [July 21, 2018, 10:10am UTC](https://discuss.elastic.co/t/hardware-requirements-for-elasticsearch-6-3-1/140919/4 "2018-07-21T10:10:51Z")
Probably to 512MB, assuming Elasticsearch is the only thing running on the node. ---
**Author:** ![adrwer](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/adrwer/32/35629_2.png) [@adrwer](https://discuss.elastic.co/u/adrwer)\ **Post date:** [July 21, 2018, 3:43pm UTC](https://discuss.elastic.co/t/hardware-requirements-for-elasticsearch-6-3-1/140919/5 "2018-07-21T15:43:52Z")
I'm running the LAMP stack too, will that affect performance negatively? ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [July 21, 2018, 3:49pm UTC](https://discuss.elastic.co/t/hardware-requirements-for-elasticsearch-6-3-1/140919/6 "2018-07-21T15:49:38Z")
Yes, I sound very little RAM for running Elasticsearch as well as other components. You may be able to go lower that 512MB, but I have no experience running Elasticsearch with such small heap. ---
**Author:** ![adrwer](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/adrwer/32/35629_2.png) [@adrwer](https://discuss.elastic.co/u/adrwer)\ **Post date:** [July 21, 2018, 4:12pm UTC](https://discuss.elastic.co/t/hardware-requirements-for-elasticsearch-6-3-1/140919/7 "2018-07-21T16:12:40Z")
Thank you Christian. You really have been of a lot of help. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [August 18, 2018, 4:20pm UTC](https://discuss.elastic.co/t/hardware-requirements-for-elasticsearch-6-3-1/140919/8 "2018-08-18T16:20:41Z")
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