I've been using OpenTSDB on top of MapR-DB (v 5.2) for pushing a year now with virtually no issues.
The amount of data being written and queried has not changed and the amount of historic data we keep is the same.
We are suddenly seeing intermittent hangs in OpenTSDB now though (30 seconds here and there) and I'm 99% sure they are relate to MapR-DB. We also saw one permanent hang where we had to reboot the OpenTSDB instances.
Is there a way I can monitor MapR-DB's workload to see if it is overwhelmed or experiencing issues? Our internal MapR-Metrics OpenTSDB instance was disabled due to a MapR bug, so I need ways to analyze it without using that.