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https://issues.apache.org/jira/browse/CASSANDRA-15900?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ZhaoYang updated CASSANDRA-15900:
---------------------------------
Bug Category: Parent values: Degradation(12984)Level 1 values: Resource
Management(12995)
Complexity: Normal
Discovered By: Code Inspection
Fix Version/s: 4.0-beta
Severity: Normal
Status: Open (was: Triage Needed)
> Close channel and reduce buffer allocation during entire sstable streaming
> with SSL
> -----------------------------------------------------------------------------------
>
> Key: CASSANDRA-15900
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15900
> Project: Cassandra
> Issue Type: Bug
> Components: Legacy/Streaming and Messaging
> Reporter: ZhaoYang
> Assignee: ZhaoYang
> Priority: Normal
> Fix For: 4.0-beta
>
>
> CASSANDRA-15740 added the ability to stream entire sstable by loading on-disk
> file into user-space off-heap buffer when SSL is enabled, because netty
> doesn't support zero-copy with SSL.
> But there are two issues:
> # file channel is not closed.
> # 1mb batch size is used. 1mb exceeds buffer pool's max allocation size, thus
> it's all allocated outside the pool and will cause large amount of
> allocations.
>
> [Patch|https://github.com/apache/cassandra/pull/651]:
> # close file channel when the last batch is loaded into off-heap bytebuffer.
> # reduce the batch to 64kb which is more buffer pool friendly when streaming
> entire sstable with SSL.
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