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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11206) Enable automagically tweaking memstore and blockcache sizes
Date Tue, 20 May 2014 04:03:39 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14002759#comment-14002759
] 

stack commented on HBASE-11206:
-------------------------------

[~mantonov] Different.  We have a feature that adjusts memstore vs blockcache sizes in trunk
but it is off by default.  Here I suggest we turn it on for the duration of the 0.99 releases
to see if stable enough to include in 1.0.

> Enable automagically tweaking memstore and blockcache sizes
> -----------------------------------------------------------
>
>                 Key: HBASE-11206
>                 URL: https://issues.apache.org/jira/browse/HBASE-11206
>             Project: HBase
>          Issue Type: Task
>            Reporter: stack
>            Assignee: stack
>             Fix For: 0.99.0
>
>
> HBASE-5349
> "Automagically tweak global memstore and block cache sizes based on workload" adds a
nice new feature. It is off by default.  Lets turn it on for 0.99.  Liang Xie is concerned
that automatically shifting blockcache and memstore sizes could wreck havoc w/ GC'ing in low-latency
serving situation -- a valid concern -- but lets enable this feature in 0.99 and see how it
does.  Can always disable it before 1.0 if a problem.



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