Blake Eggleston created CASSANDRA-19940:
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Summary: CEP-15 (C*) - misc accord perf improvements
Key: CASSANDRA-19940
URL: https://issues.apache.org/jira/browse/CASSANDRA-19940
Project: Cassandra
Issue Type: Bug
Components: Accord
Reporter: Blake Eggleston
Assignee: Blake Eggleston
This adds a handful of relatively minor changes that makes high key density
accord workloads more performant.
Increase accord repair range splitting - given a cluster with 6 million keys,
this splits up accord repairs into 600 key chunks.
Streamline table metadata fetching - removes some unnecessary abstraction from
the table metadata lookup path, which we hit a lot during key deserialization.
Remote unnecessary set building when building lists of overlapping keys - we
don’t need to dedupe keys and the set building was taking a decent chunk of
time.
Add separate recover delay for repair and increase default recover delay - this
significantly reduces the number of preemptions.
The range splitting and recovery delay changes stabilize performance today, but
are kind of a stop gap - we should be able to support larger repair ranges and
shorter recovery delays.
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