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From "Gary Helmling (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-17057) Minor compactions should also drop page cache behind reads
Date Fri, 24 Feb 2017 23:51:44 GMT

     [ https://issues.apache.org/jira/browse/HBASE-17057?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Gary Helmling updated HBASE-17057:
    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

Committed to branch-1.3+.

[~ashu210890], can you add a release note for this?

> Minor compactions should also drop page cache behind reads
> ----------------------------------------------------------
>                 Key: HBASE-17057
>                 URL: https://issues.apache.org/jira/browse/HBASE-17057
>             Project: HBase
>          Issue Type: Improvement
>          Components: Compaction
>            Reporter: Ashu Pachauri
>            Assignee: Ashu Pachauri
>             Fix For: 1.3.1
>         Attachments: HBASE-17057.V1.patch, HBASE-17057.V2.patch
> Long compactions currently drop cache behind reads/writes so that they don't pollute
the page cache but short compactions don't do that. The bulk of the data is actually read
during minor compactions instead of major compactions,  and thrashes the page cache since
it's mostly not needed. 
> We should drop page cache behind minor compactions too. 

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