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From "chunhui shen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17757) Unify blocksize after encoding to decrease memory fragment
Date Thu, 09 Mar 2017 01:57:38 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15902318#comment-15902318
] 

chunhui shen commented on HBASE-17757:
--------------------------------------

bq.We have a tool to get a cache summery online
The tool seems useful for this feature,  make the patch in new issue?

> Unify blocksize after encoding to decrease memory fragment 
> -----------------------------------------------------------
>
>                 Key: HBASE-17757
>                 URL: https://issues.apache.org/jira/browse/HBASE-17757
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Allan Yang
>            Assignee: Allan Yang
>         Attachments: HBASE-17757.patch
>
>
> Usually, we store encoded block(uncompressed) in blockcache/bucketCache. Though we have
set the blocksize, after encoding, blocksize is varied. Varied blocksize will cause memory
fragment problem, which will result in more FGC finally.In order to relief the memory fragment,
This issue adjusts the encoded block to a unified size.



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