SQLServer Probe: Add Checkpoints

Idea created by mark.de.boer on Feb 6, 2018

    It would be nice to have the ntperf sql counters also available as checkpoints in the sql server probe.


    For some performance metrics, additional counters are needed like forwarded_records per sec, Lazy writes/sec, ... and these are only readable from ntperf probe.


    Advantage of the sql probe is that it's usable as an agentless probe, plus it can connect to the cluster ip instead of the nodes, so only the active node gives data.


    As it is now, the sql server probe is only usable in certain cases, where the provided checkpoints are sufficient.


    best regards