[HDFS-15517] Add operation names for all logics calling FSNamesystem#writeUnlock() to record their writeLock held times

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.9.0, 3.3.0
• Fix Version/s: 2.9.0, 3.3.0
• Component/s: metrics, namenode
• Assignee: Xiao Liang
• Reporter: Xiao Liang
• Created: 06/Aug/20 22:38
• Updated: 19/Aug/20 02:21

Description

Add operation names for all logics calling FSNamesystem#writeUnlock() to record their writeLock held times, to get detailed counter metrics for them, instead of using "OTHER", this is helpful for performance analysis.