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https://issues.apache.org/jira/browse/CASSANDRA-18212?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Capwell updated CASSANDRA-18212:
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Reviewers: Benedict Elliott Smith, David Capwell (was: David Capwell)
Status: Review In Progress (was: Patch Available)
> Reduce memory allocations of calls to ByteBufer.duplicate() made in
> org.apache.cassandra.transport.CBUtil#writeValue
> --------------------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-18212
> URL: https://issues.apache.org/jira/browse/CASSANDRA-18212
> Project: Cassandra
> Issue Type: Improvement
> Components: Legacy/Local Write-Read Paths
> Reporter: Natnael Adere
> Assignee: Natnael Adere
> Priority: Normal
> Attachments: DiskBased.png, allocations-after.html,
> allocations-before.html
>
> Time Spent: 2.5h
> Remaining Estimate: 0h
>
> Currently,
> org.apache.cassandra.transport.CBUtil#writeValue(java.nio.ByteBuffer,
> io.netty.buffer.ByteBuf) calls ByteBufer.duplicate() and is found to be 20%
> of memory allocations in production. No changes have been made to reduce this
> but there is discussion related to the issue in CASSANDRA-13741. Attached
> below are the performance result for disk based queries and mostly memory
> based queries.
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