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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12023) HRegion.applyFamilyMapToMemstore creates too many iterator objects.
Date Sat, 20 Sep 2014 23:20:33 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14142235#comment-14142235
] 

Lars Hofhansl commented on HBASE-12023:
---------------------------------------

Agreed let's keep this open. I do want to have an RC for 0.94.24 soon. Worst case I'll file
a new jira.

bq. We can do the same optimization to HRegion#addFamilyMapToWALEdit too

Good call. [~vrodionov], I wonder why this one did not show up in your trace.

> HRegion.applyFamilyMapToMemstore creates too many iterator objects.
> -------------------------------------------------------------------
>
>                 Key: HBASE-12023
>                 URL: https://issues.apache.org/jira/browse/HBASE-12023
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.98.5, 0.94.23
>            Reporter: Vladimir Rodionov
>            Assignee: Vladimir Rodionov
>            Priority: Minor
>             Fix For: 2.0.0, 0.98.7, 0.94.24, 0.99.1
>
>         Attachments: 12023-trunk.txt, HBASE-12023-0.94.patch, HBASE-12023.patch, applyFamilyMapToMemstore
(1).tiff
>
>
> for ... loop (creates iterator) inside another for loop. Produces a lot of garbage. See
attached picture.



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