ZhaoYang created CASSANDRA-15900:
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Summary: 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
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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