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https://issues.apache.org/jira/browse/CASSANDRA-21287?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitry Konstantinov updated CASSANDRA-21287:
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Change Category: Performance
Complexity: Normal
Status: Open (was: Triage Needed)
> Reduce memory allocation in Cassandra read path
> -----------------------------------------------
>
> Key: CASSANDRA-21287
> URL: https://issues.apache.org/jira/browse/CASSANDRA-21287
> Project: Apache Cassandra
> Issue Type: Epic
> Components: Consistency/Coordination, Local/Memtable, Local/SSTable
> Reporter: Dmitry Konstantinov
> Assignee: Dmitry Konstantinov
> Priority: Normal
>
> The epic accumulates improvements about reducing of memory allocations in
> Cassandra read path.
> The drivers for this epic are:
> * to reduce GC pressure -> reduce GC overhead and GC pauses
> frequency/duration. In case of low-latency GC reducing of memory allocation
> also helps to move forward the threshold when the system throughput is
> limited by the memory allocation throughput a GC is able to process without
> slowing down an app (allocation stalls).
> * memory allocations also help to highlight the places to optimize from CPU
> usage point of view by just doing less work
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