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From "Allan Yang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-17757) Unify blocksize after encoding to decrease memory fragment
Date Sun, 30 Apr 2017 04:04:04 GMT

     [ https://issues.apache.org/jira/browse/HBASE-17757?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Allan Yang updated HBASE-17757:
-------------------------------
    Attachment: HBASE-17757v4-branch-1.patch

attached a patch for branch-1 [~anoopsamjohn]

> 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
>             Fix For: 2.0.0
>
>         Attachments: HBASE-17757.patch, HBASE-17757v2.patch, HBASE-17757v3.patch, HBASE-17757v4-branch-1.patch,
HBASE-17757v4.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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