Dmitry Konstantinov created CASSANDRA-20486:
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Summary: Apply memtable sharding to write request thread pool
Key: CASSANDRA-20486
URL: https://issues.apache.org/jira/browse/CASSANDRA-20486
Project: Apache Cassandra
Issue Type: Improvement
Components: Local/Memtable
Reporter: Dmitry Konstantinov
Attachments: image-2025-03-26-21-03-21-342.png
An idea to evaluate: our memtables use sharding approach with a single writer
guarded by lock or use optimistic concurrency with retries in case of
contention, so when we have a high rate of writes we spend time/CPU for lock
parking/unparking or by contending on optimistic locking.
!image-2025-03-26-21-03-21-342.png|width=300!
A possible way to reduce or even almost avoid such overheads can be applying
the same kind of sharding for write request threads.
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