Ariel Weisberg created CASSANDRA-14194:
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Summary: Chain commit log marker potential performance regression
in batch commit mode
Key: CASSANDRA-14194
URL: https://issues.apache.org/jira/browse/CASSANDRA-14194
Project: Cassandra
Issue Type: Bug
Components: Core, Testing
Reporter: Ariel Weisberg
Assignee: Jason Brown
CASSANDRA-13987 modified how the commit log sync thread works. I noticed that
cql3.ViewTest and ViewTaskTest have been timing out, but only in CircleCI. When
I jstack in CircleCI what I see is that the commit log writer thread is parked
and the threads trying to append to the commit log are blocked waiting on it.
I tested the commit before 13987 and it passed in CircleCI and then I tested
with 13987 and it timed out. I suspect this may be a general performance
regression and not just a CircleCI issue.
And this is with write barriers disabled (sync thread doesn't actually sync) so
it wasn't blocked in the filesystem.
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