kinder gentler compaction
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Key: CASSANDRA-1181
URL: https://issues.apache.org/jira/browse/CASSANDRA-1181
Project: Cassandra
Issue Type: Task
Reporter: Jonathan Ellis
Assignee: Brandon Williams
Fix For: 0.7
I suggested this in a ML thread but it seems that nobody actually tried it. I
think it's worth following up on:
You could try setting the compaction thread to a lower priority. You could add
a thread priority to NamedThreadPool, and pass that up from CompactionExecutor
constructor. According to
http://www.javamex.com/tutorials/threads/priority_what.shtml you have to run as
root and add a JVM option to get this to work.
In particular, Brandon saw stress.py read latencies spike to 100ms during
[anti]compaction on a 2 core machine. I'd like to see if this can mitigate
that.
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