[HDFS-17335] Add metrics for syncWaitQ in FSEditLogAsync

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 3.3.6
• Component/s: namenode
• Labels: pull-request-available
• Target Version/s: 3.5.0
• Assignee: farmmamba
• Reporter: farmmamba
• Created: 10/Jan/24 09:52
• Updated: 26/Apr/24 10:12

Description

To monitor syncWaitQ in FSEditLogAsync, we add a metric syncPendingCount.

The reason we add this metrics is that when dequeueEdit() return null,  the boolean variable doSync is set to !syncWaitQ.isEmpty()    After adding this metrics we can better monitor sync performance and codes.

Issue Links

• links to: GitHub Pull Request #6431