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From "Elliott Clark (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14942) Allow turning off BoundedByteBufferPool
Date Mon, 07 Dec 2015 21:33:11 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15045777#comment-15045777
] 

Elliott Clark commented on HBASE-14942:
---------------------------------------

Yes this is off heap, and probably not the largest issue. And I don't know for sure that it
will be *the* culprit. However when running G1 we're seeing way too many things end up in
the old gen that shouldn't be. So I'm trying to find all things that are keeping objects alive
in the name of not fragmenting the heap. Any of those things make life much worse on a recent
garbage collector.

> Allow turning off BoundedByteBufferPool
> ---------------------------------------
>
>                 Key: HBASE-14942
>                 URL: https://issues.apache.org/jira/browse/HBASE-14942
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 2.0.0, 1.2.0, 1.3.0
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>             Fix For: 2.0.0, 1.2.0, 1.3.0
>
>         Attachments: HBASE-14942.patch
>
>
> The G1 does a great job of compacting, there's no reason to use the BoundedByteBufferPool
when the JVM can it for us. So we should allow turning this off for people who are running
new jvm's where the G1 is working well.



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