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Posted to commits@cassandra.apache.org by "Josh McKenzie (Jira)" <ji...@apache.org> on 2022/08/26 16:07:00 UTC

[jira] [Created] (CASSANDRA-17868) Allow disabling hotness persistence, or tuning of rate limiter

Josh McKenzie created CASSANDRA-17868:
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             Summary: Allow disabling hotness persistence, or tuning of rate limiter
                 Key: CASSANDRA-17868
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-17868
             Project: Cassandra
          Issue Type: Improvement
          Components: Feature/Rate Limiting
            Reporter: Josh McKenzie
            Assignee: Josh McKenzie


The persisting of the sstables hotness when there are 10s of thousands of sstables can have issues keeping up, and the rate limiter is hard coded. Another option may be nice to just completely disable the feature.

When sstables super backed up (from repairs) the hotness tracking tends to cause the STCS in L0 to make poor decisions, always grabbing the large sstables and skipping the tiny sstables that would benefit more.



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