[KUDU-3284] Imporve logging of block tranaction in tserver's lock manager

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: tablet
• Assignee: Unassigned
• Reporter: mintao
• Created: 12/May/21 07:48
• Updated: 12/May/21 07:48

Description

When multiple client updates same row simultaneously，there will incur a high contention and degrade perfermance of tserver.The current version provides less information and makes it hard to diagnose which tablet cause high contention.

W0511 02:05:10.302363 192070 lock_manager.cc:368] Waited 53 seconds to obtain row lock on key <redacted> cur holder: 0xfc7096c0

It would be nice if includes tabletID in the logging of blocking transaction and adds a metric about lock acquisition time about each tablet.