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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9868) Remove some array copy, especially around protobuf
Date Thu, 31 Oct 2013 17:07:23 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9868?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13810437#comment-13810437
] 

stack commented on HBASE-9868:
------------------------------

I'm looking at this stuff too.  I wonder if some of Elliott's issue in client was just GCing.
 I have a 4G heap and running through 1M row cycles, I OOME at the 4th or 5th run w/ faked
1k servers and 100k regions.  Looking for the root... If I were to guess it'd be the soft
reference cache.  Will report back.

> Remove some array copy, especially around protobuf
> --------------------------------------------------
>
>                 Key: HBASE-9868
>                 URL: https://issues.apache.org/jira/browse/HBASE-9868
>             Project: HBase
>          Issue Type: Bug
>          Components: Client, Protobufs
>    Affects Versions: 0.98.0, 0.96.0
>            Reporter: Nicolas Liochon
>            Assignee: Nicolas Liochon
>             Fix For: 0.98.0, 0.96.1
>
>         Attachments: 9868.v1.patch
>
>
> Profiling the client shows that we're spending some time in array copy (10% of the code
execution, 3% of the total time) in some array copy that we can avoid.



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