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Posted to user@phoenix.apache.org by Azharuddin Shaikh <az...@gmail.com> on 2018/11/16 13:44:20 UTC

Heap Size Recommendation

Hi All,

We want to improve the read performance of phoenix query for which we are
trying to upgrade the HBASE_HEAPSIZE.

Currently we have 32 GB memory available on server where default 8 GB
memory is allocated to HBASE_HEAPSIZE(Default of JVM Heap Size). We want to
increase HBASE_HEAPSIZE to 16 GB, so do we need to increase JVM Heap size
as well or there is no need to increase JVM Heap size.

Let us know what is the recommendation for increasing HBASE_HEAPSIZE with
respect to JVM Heap size. We tried to refer various document but we have
still not received the exact answer to this question.

Thank you,

Azhar

Re: Heap Size Recommendation

Posted by Josh Elser <el...@apache.org>.

HBASE_HEAPSIZE is just an environment variable which sets the JVM heap 
size. Your question doesn't make any sense to me.

On 11/16/18 8:44 AM, Azharuddin Shaikh wrote:
> Hi All,
> 
> We want to improve the read performance of phoenix query for which we 
> are trying to upgrade the HBASE_HEAPSIZE.
> 
> Currently we have 32 GB memory available on server where default 8 GB 
> memory is allocated to HBASE_HEAPSIZE(Default of JVM Heap Size). We want 
> to increase HBASE_HEAPSIZE to 16 GB, so do we need to increase JVM Heap 
> size as well or there is no need to increase JVM Heap size.
> 
> Let us know what is the recommendation for increasing HBASE_HEAPSIZE 
> with respect to JVM Heap size. We tried to refer various document but we 
> have still not received the exact answer to this question.
> 
> Thank you,
> 
> Azhar
>

Re: Heap Size Recommendation

Posted by anil gupta <an...@gmail.com>.

Phoenix query read performance is not only related to JVM heapsize but
increasing heapsize helps in having a bigger cache and read perf in some
cases.
I am assuming you are talking about increasing heapsize of
RegionServer(RS). For a 32 gb RS machine(assuming its only running a
Datanode daemon and not used for MR/Spark jobs), i think its gonna be ok if
you have a heap size of 24 gb for RS.

Hope this helps,
Anil Gupta

On Tue, Nov 20, 2018 at 3:45 AM Azhar Shaikh <az...@gmail.com>
wrote:

> Hi All,
>
> Is there any update on Heap Size Recommendation.
>
> Your help is greatly appreciated.
>
> Thanks
>
>
>
> --
> Sent from: http://apache-phoenix-user-list.1124778.n5.nabble.com/
>

-- 
Thanks & Regards,
Anil Gupta

Re: Heap Size Recommendation

Posted by Azhar Shaikh <az...@gmail.com>.

Hi All,

Is there any update on Heap Size Recommendation.

Your help is greatly appreciated.

Thanks 



--
Sent from: http://apache-phoenix-user-list.1124778.n5.nabble.com/