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From "Nicolas Liochon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9868) Remove some array copy, especially around protobuf
Date Thu, 31 Oct 2013 19:11:18 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9868?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13810569#comment-13810569
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Nicolas Liochon commented on HBASE-9868:
----------------------------------------

bq. I don't see blockage (maybe my 'servers' are too friction-free being in essence /dev/nulls).
I see it in "public synchronized V lowerValueByKey". It's with a real cluster, but there are
a lot of region and the i/o are good, so don't have any retry.

> 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.trunk.v1.patch, 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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