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Posted to commits@cassandra.apache.org by "Jonathan Ellis (JIRA)" <ji...@apache.org> on 2013/05/08 06:33:15 UTC

[jira] [Created] (CASSANDRA-5549) Remove Table.switchLock

Jonathan Ellis created CASSANDRA-5549:
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             Summary: Remove Table.switchLock
                 Key: CASSANDRA-5549
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5549
             Project: Cassandra
          Issue Type: Bug
            Reporter: Jonathan Ellis
             Fix For: 2.0


As discussed in CASSANDRA-5422, Table.switchLock is a bottleneck on the write path.  ReentrantReadWriteLock is not lightweight, even if there is no contention per se between readers and writers of the lock (in Cassandra, memtable updates and switches).

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