[HBASE-21252] Collect loadavg when gathering machine environment

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Assignee: Unassigned
• Reporter: Duo Zhang
• Created: 28/Sep/18 13:08
• Updated: 28/Sep/18 13:41
• Resolved: 28/Sep/18 13:41

Description

Skimmed several flaky test report, it seems that, for a successful run, the SystemLoadAverage is usually less than 500, and for a failed run, the SystemLoadAverage is usually greater than 1000.

Let's collect the loadavg in the script to see if the machine itself has already overloaded before we actually execute the tests.