[HIVE-13087] LLAP: Print STW pause time and useful application time

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.1.0
• Fix Version/s: 2.1.0
• Assignee: Prasanth Jayachandran Assign to me
• Reporter: Prasanth Jayachandran
• Created: 18/Feb/16 19:04
• Updated: 21/Jun/16 15:43
• Resolved: 18/Feb/16 22:10

Description

The daemons currently prints GC details. It will be useful to print the total useful time application spent and the total time for which application threads are stopped.

Need to add

-XX:+PrintGCApplicationStoppedTime -XX:+PrintGCApplicationConcurrentTime

to get something like

Application time: 0.3440086 seconds
Total time for which application threads were stopped: 0.0620105 seconds
Application time: 0.2100691 seconds
Total time for which application threads were stopped: 0.0890223 seconds

Reference: https://plumbr.eu/blog/performance-blog/logging-stop-the-world-pauses-in-jvm

NO PRECOMMIT TESTS