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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1127) OOME running randomRead PE
Date Fri, 16 Jan 2009 08:12:59 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12664429#action_12664429
] 

Andrew Purtell commented on HBASE-1127:
---------------------------------------

+1

IMHO blockcache should be off by default, except for meta, where HBase can clearly establish
a benefit. Otherwise, it's up to the application to decide if sufficient benefit is derived
to offset the risk of the added heap pressure. Many applications of the archival type will
not benefit from blockcache on their tables, for example.


> OOME running randomRead PE
> --------------------------
>
>                 Key: HBASE-1127
>                 URL: https://issues.apache.org/jira/browse/HBASE-1127
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: stack
>            Priority: Blocker
>             Fix For: 0.19.0
>
>
> Blockcache is misbehaving on TRUNK.  Something is broke.  We OOME about 20% into the
randomRead test.  Looking at heap, its all soft references.  Instrumenting the referencequeue,
we're never clearing full gc'ing.  Something is off.

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