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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HBASE-18442) Speed up Memstore chunk pool ByteBuffer allocations
Date Wed, 27 Sep 2017 10:09:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16182307#comment-16182307
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Anoop Sam John edited comment on HBASE-18442 at 9/27/17 10:08 AM:
------------------------------------------------------------------

MSLAB chunk pool, the initialCount by def is 0 right?   Seems that is not been considered
in the patch.  Normally the initial count will be much lesser than he max possible chunks
count?   When it will really start making a perf diff? (Multi threaded way).  Do we expect
that big size to be in use?  I mean am not fully sure whether we need this multi threaded
fix fo rthe MSLAB chunk pool


was (Author: anoop.hbase):
MSLAB chunk pool, the initialCount

> Speed up Memstore chunk pool ByteBuffer allocations
> ---------------------------------------------------
>
>                 Key: HBASE-18442
>                 URL: https://issues.apache.org/jira/browse/HBASE-18442
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>             Fix For: 2.0.0, 2.0.0-alpha-4
>
>         Attachments: HBASE-18442_1.patch, HBASE-18442_2.patch, HBASE-18442_3.patch, HBASE-18442_4.patch
>
>
> Like in HBASE-17738 we can speed up the allocation of memstore chunk pool's ByteBuffers.
{code}
> 2017-07-24 17:51:09,726 INFO  [regionserver/stobdtserver6/10.66.254.41:16020] regionserver.ChunkCreator:
Allocating MemStoreChunkPool with chunk size 2 MB, max count 12288, initial count 12288
> 2017-07-24 17:51:19,642 INFO  [regionserver/stobdtserver6/10.66.254.41:16020] regionserver.HRegionServer:
Serving as stobdtserver6,16020,1500898858958, RpcServer on stobdtserver6/10.66.254.41:16020,
sessionid=0x15d748a9ccc0002
> {code}
> Allocating 12288 buffers of 2MB size takes around 10 secs. 



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