Using Diamond you can easily get all
of the MongoDB server
status metrics into
Graphite but the
globalLock.ratio is a bit misleading in that it is based on
the total uptime of Mongo, which could be a while, and not on recent usage
patterns. And in 2.2 it disappears anyway!
The metrics that are included though that help are
globalLock.lockTime which can be used to find the lock ratio/percentage over
whatever sampling period you use.
The percentage winds up being
You can remove the
scale function to get the ratio. This doesn't work with
globbing in Graphite though. You can scale the
lockTime though to be able to
get a globbable lock ratio for all of your Mongo servers, the exact value will
depend on the sampling period.