[Openstack-operators] ElasticSearch on OpenStack

David Medberry openstack at medberry.net
Fri Sep 2 20:18:37 UTC 2016

Nathan: The page at
gives you good advice on a maximum size for the elasticsearch VM's memory.

Nathan: suggest you pick a flavor with 64GB RAM or less, then base other
sizing things off of that (i.e. choose a flavor with 64GB of RAM and as
many CPUs as possible for that RAM allocation, then base disk size on
testing of your use case)

Nathan: give java heap 30GB, and leave the rest of the memory to the OS
filesystem cache so that Lucene can make best use of it.

Nathan: that's mostly it for tuning. elasticsearch publishes many other
docs for tuning recommendations, but there isn't anything specific to
openstack besides the flavor choice. i personally chose CPU size (8CPU)
such that all vCPUs for each VM would fit on a single NUMA node, which is a
best practice for ESXi but not sure if it applies to KVM.

(resending for clarity)

On Fri, Sep 2, 2016 at 6:46 AM, David Medberry <openstack at medberry.net>

> Hey Tim,
> We've just started this effort. I'll see if the guy running the service
> can comment today.
> On Fri, Sep 2, 2016 at 6:36 AM, Tim Bell <Tim.Bell at cern.ch> wrote:
>> Has anyone had experience running ElasticSearch on top of OpenStack VMs ?
>> Are there any tuning recommendations ?
>> Thanks
>> Tim
>> _______________________________________________
>> OpenStack-operators mailing list
>> OpenStack-operators at lists.openstack.org
>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack-operators/attachments/20160902/1881bde8/attachment.html>

More information about the OpenStack-operators mailing list