[CASSANDRA-5549] Remove Table.switchLock

• Type: Improvement
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 2.1 beta1
• Labels: qa-resolved
• Assignee: Benedict Elliott Smith
• Reporter: Jonathan Ellis

Authors

Benedict Elliott Smith

Reviewers

Jonathan Ellis

• Tester: Ryan McGuire
• Created: 08/May/13 04:32
• Updated: 16/Apr/19 09:32
• Resolved: 04/Feb/14 06:05

Description

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).

Issue Links

• breaks: CASSANDRA-6739 Exception on nodetool cfstats