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https://issues.apache.org/jira/browse/CASSANDRA-9929?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Stupp updated CASSANDRA-9929:
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Description:
CASSANDRA-9739 usually have tiny cache entries. The overhead of any
general-purpose memory allocator is probably too high.
[~benedict] proposed a chunked allocation strategy for OHC that allows to
allocate the whole memory up-front - thus reducing the malloc/free overhead to
0.
(EDIT: Key cache does not have tiny cache entries - at least not now)
was:
CASSANDRA-9738 + CASSANDRA-9739 usually have tiny cache entries. The overhead
of any general-purpose memory allocator is probably too high.
[~benedict] proposed a chunked allocation strategy for OHC that allows to
allocate the whole memory up-front - thus reducing the malloc/free overhead to
0.
> More efficient memory handling for tiny off-heap cache entries
> --------------------------------------------------------------
>
> Key: CASSANDRA-9929
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9929
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Robert Stupp
> Assignee: Robert Stupp
> Priority: Minor
> Fix For: 3.x
>
>
> CASSANDRA-9739 usually have tiny cache entries. The overhead of any
> general-purpose memory allocator is probably too high.
> [~benedict] proposed a chunked allocation strategy for OHC that allows to
> allocate the whole memory up-front - thus reducing the malloc/free overhead
> to 0.
> (EDIT: Key cache does not have tiny cache entries - at least not now)
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