Dmitry Konstantinov created CASSANDRA-21083:
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Summary: Optimize memtable flush logic
Key: CASSANDRA-21083
URL: https://issues.apache.org/jira/browse/CASSANDRA-21083
Project: Apache Cassandra
Issue Type: Improvement
Components: Local/Memtable
Reporter: Dmitry Konstantinov
Memtable flushing to disk impacts write performance and can be a limiting
factor for write throughput:
* If we cannot flush fast enough we have to limit writes to memtables due to
lack of available memory for them
* flushing logic can be CPU-intensive and complete with writing threads for
CPU by stealing 1-2 cores (or even more if memtable_flush_writers is set to a
higher value)
More details about suggested optimisations will be added later.
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