[CASSANDRA-2178] Memtable Flush writers doesn't actually flush in parallel

• Type: Bug
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 0.7.3, 0.8 beta 1
• Severity: Low
• Assignee: Chris Goffinet
• Reporter: Chris Goffinet

Authors

Chris Goffinet

• Created: 17/Feb/11 01:45
• Updated: 16/Apr/19 09:33
• Resolved: 17/Feb/11 02:44

Description

The flushWriter JMXEnabledThreadPoolExecutor sets the core pool min to 1, and sets the LBQ to DatabaseDescriptor.getFlushWriters(). Increasing memtable_flush_writers should allow us to flush more in parallel. The pool will not grow until LBQ fills up to DatabaseDescriptor.getFlushWriters().