[
https://issues.apache.org/jira/browse/CASSANDRA-2252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13091209#comment-13091209
]
Yang Yang commented on CASSANDRA-2252:
--------------------------------------
Thanks Jonathan,
but why do we need them alive?
for example
I create a 2MB region, which is carved out to 100 ByteBuffers, each of these
ByteBuffers would point to the "data" of the Region, so as long as one of them
is live, the bytes pointed to by Region.data is still in heap; and if these 100
ByteBuffers all die, isn't it our goal to free the 2MB region, since no one is
using them??
> arena allocation for 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: 1.0
>
> Attachments: 0001-add-MemtableAllocator.txt,
> 0002-add-off-heap-MemtableAllocator-support.txt, 2252-v3.txt, 2252-v4.txt,
> merged-2252.tgz
>
>
> The memtable design practically actively fights Java's GC design. Todd
> Lipcon gave a good explanation over on HBASE-3455.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
