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Posted to commits@cassandra.apache.org by "C. Scott Andreas (JIRA)" <ji...@apache.org> on 2018/11/18 18:09:01 UTC
[jira] [Updated] (CASSANDRA-9929) More efficient memory handling
for tiny off-heap cache entries
[ https://issues.apache.org/jira/browse/CASSANDRA-9929?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
C. Scott Andreas updated CASSANDRA-9929:
----------------------------------------
Component/s: Core
> 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
> Components: Core
> Reporter: Robert Stupp
> Assignee: Robert Stupp
> Priority: Minor
> Fix For: 4.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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