[CASSANDRA-7045] Investigate changes to threading model for network consumers to improve performance for small messages

• Type: Improvement
• Status: Resolved
• Priority: Normal
• Resolution: Duplicate
• Labels: performance
• Assignee: Benedict Elliott Smith
• Reporter: Benedict Elliott Smith

Authors

Benedict Elliott Smith

• Created: 16/Apr/14 11:13
• Updated: 16/Apr/19 09:31
• Resolved: 13/Jun/14 02:34

Description

See CASSANDRA-7029 for original discussion.

We can (maybe) optimise the threading model for network consumers: since we generally process very small messages (200 bytes not at all implausible), the thread signalling costs on the processing thread can actually dramatically impede throughput. In general it costs ~10micros to signal (and passing the message to another thread for processing in the current model requires signalling). For 200-byte messages this caps our throughput at 20MB/s.

Issue Links

• is superceded by: CASSANDRA-4718 More-efficient ExecutorService for improved throughput