[IOTDB-2193] Reduce unnecessary lock operations to improve writing performance in cluster

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: master branch, 0.12.4
• Component/s: Core/Cluster
• Labels: pull-request-available
• Sprint: 2021-12-Tan
• Assignee: Quan Siyi
• Reporter: Quan Siyi
• Created: 23/Dec/21 07:58
• Updated: 31/Dec/21 01:02
• Resolved: 29/Dec/21 01:11

Description

In method raftmember.processPlanLocally, some time consuming operation holds the lock of RaftLogManager without necessity. This cause writing performance of cluster declines.

The PhysicalPlanLog.serialize() is time consuming(31.5%), and it holds the lock of RaftLogManager without necessity.

After this improvement, using benchmark and Jprofile to determine the improvement takes effect.

Issue Links

• links to: GitHub Pull Request #4638