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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12765) SplitTransaction creates too many threads (potentially)
Date Sun, 28 Dec 2014 07:29:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14259589#comment-14259589
] 

Lars Hofhansl commented on HBASE-12765:
---------------------------------------

At the very very least we should log how many files we are attempting to split, get a historic
feel for the number of files that needed to be split. Could also expose this as a global metric:
Number of files split or something.

> SplitTransaction creates too many threads (potentially)
> -------------------------------------------------------
>
>                 Key: HBASE-12765
>                 URL: https://issues.apache.org/jira/browse/HBASE-12765
>             Project: HBase
>          Issue Type: Brainstorming
>            Reporter: Lars Hofhansl
>
> In splitStoreFiles(...) we create a new thread pool with as many threads as there are
files to split.
> We should be able to do better. During times of very heavy write loads there might be
a lot of files to split and multiple splits might be going on at the same time on the same
region server.



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