I would look at load (disk space used) and system.compactions_in_progress.
On Tue, Jul 22, 2014 at 3:49 PM, Arup Chakrabarti <a...@pagerduty.com> wrote: > We have been going through and setting up alerts on our Cassandra > clusters. We have catastrophic alerts setup to let us know when things are > super broken, but we are now looking at setting up alerts for letting us > know when we need to start scaling vertically or horizontally. > > We have alerts on our system metrics. What are the recommended metrics > from the JMX that are strong indicators of needing to scale? >
