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https://issues.apache.org/jira/browse/CASSANDRA-2252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13000012#comment-13000012
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Jonathan Ellis commented on CASSANDRA-2252:
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bq. The JNA-based code isn't perfect though either, I've seen heisenbug
segfaults
Described the problem at http://java.net/jira/browse/JNA-179 -- we'll need a
patch to JNA to make it possible to do what we want here. So for now we should
stick to allocating on-heap which will at least give us the reduced
fragmentation benefits.
> 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-v1.tgz
>
>
> The memtable design practically actively fights Java's GC design. Todd
> Lipcon gave a good explanation over on HBASE-3455.
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