Make GC pauses more obvious to users
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Key: HBASE-3336
URL: https://issues.apache.org/jira/browse/HBASE-3336
Project: HBase
Issue Type: Improvement
Components: regionserver
Affects Versions: 0.92.0
Reporter: Todd Lipcon
We often see users hit GC pauses, but it's not obvious to them what happened. I
propose we add a "GCMonitor" thread which wakes up every few seconds and checks
(a) that it slept for around the right amount of time, and (b) uses the JVM GC
metrics to see if there was a long pause. If a long pause is detected we should
output a very loud and obnoxious message to the logs indicating that a length
GC pause occurred, and point to a wiki page on the topic.
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