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From "Stu Hood (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-2252) off-heap memtables
Date Sun, 10 Apr 2011 21:51:06 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13018160#comment-13018160
] 

Stu Hood commented on CASSANDRA-2252:
-------------------------------------

This will need a rebase post-2006. In particular, we'll need to include the bytes allocated
by the allocator in the live size, and make sure the shared buffers/slabs are excluded by
JAMM.

> off-heap memtables
> ------------------
>
>                 Key: CASSANDRA-2252
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2252
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Jonathan Ellis
>            Assignee: Jonathan Ellis
>             Fix For: 0.8
>
>         Attachments: 0001-add-MemtableAllocator.txt, 0002-add-off-heap-MemtableAllocator-support.txt,
2252-alternate-v2.tgz, merged-2252.tgz
>
>   Original Estimate: 0.4h
>  Remaining Estimate: 0.4h
>
> The memtable design practically actively fights Java's GC design.  Todd Lipcon gave a
good explanation over on HBASE-3455.

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