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https://issues.apache.org/jira/browse/HBASE-14624?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14970845#comment-14970845
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Anoop Sam John commented on HBASE-14624:
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I see..  from freeBuckets we were getting last entry and down from 
completelyFreeBuckets  the 1st one.. Did not go into details and this diff got 
my mind doubtful.  +1 then.

> BucketCache.freeBlock is too expensive
> --------------------------------------
>
>                 Key: HBASE-14624
>                 URL: https://issues.apache.org/jira/browse/HBASE-14624
>             Project: HBase
>          Issue Type: Bug
>          Components: BlockCache
>    Affects Versions: 1.0.0
>            Reporter: Randy Fox
>             Fix For: 2.0.0, 1.2.0, 1.3.0, 1.0.3, 1.1.3, 0.98.16
>
>         Attachments: 14624-v1.txt, 14624-v2.txt
>
>
> Moving regions is unacceptably slow when using bucket cache, as it takes too 
> long to free all the blocks.



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