[ROCKETMQ-91] Reduce lock granularity for putMessage to get better performance

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 4.1.0-incubating
• Fix Version/s: 4.2.0
• Assignee: dongeforever
• Reporter: dongeforever
• Created: 10/Feb/17 07:02
• Updated: 13/Dec/17 09:27
• Resolved: 13/Dec/17 09:27

Description

CommitLog putMessage has a lock as:
lockForPutMessage()
....
releasePutMessageLock()

The logic inside the lock includes two main operations:
1 encode the message
2 write to the PageCache.

However, we can take the first operation(encode message) out from the lock to achieve better performance.

Issue Links

• links to: GitHub Pull Request #57