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From "Ariel Weisberg (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-10384) Create automated performance workloads and metrics collection for improving compaction performance
Date Tue, 22 Sep 2015 16:33:04 GMT
Ariel Weisberg created CASSANDRA-10384:
------------------------------------------

             Summary: Create automated performance workloads and metrics collection for improving
compaction performance
                 Key: CASSANDRA-10384
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10384
             Project: Cassandra
          Issue Type: Task
          Components: Core
            Reporter: Ariel Weisberg


This is a high level ticket (Epic or Story) and needs to be decomposed into smaller tasks.

Improving compaction performance is currently a priority. To reduce the risk of choosing what
path to take and to allow us to prune paths that don't end up being productive we need to
automate measuring the performance of compaction, maintaining a historical log, and collecting
detailed metrics that explain why we are seeing what we are seeing. 

This relates to some of the work for CASSANDRA-9259 where sub-tthe asks are closely related.
Bulk reading appears to be 60% of the CPU time associated with compaction according to flight
recorder. There is also almost complete overlap in the interest in automating the collection
of metrics that can be use to explain and advocate for pursuing (or abandoning) specific changes.



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