We are currently running Operations Manager 2012 R2 (7.1.10226.0) and I have set up some performance views to monitor our SQL 2012 instances. I set up a view for stolen pages and CPU utilisation. Once they populated, I noticed that one of our instances was
missing from these views. If I went to the standard 'All performance Data' view, the server was also missing from there for those counters but showed up for many other counters. The only thing different with the instance in question is the use of a non standard
port number. The errors in the event log on the SQL server in question point to issues connecting to the database instance. There are no firewalls in play and enabling the SQL browser service didn't help. What confused me is that a lot of Performance rules
for this instance are working. I have searched the web high and low but cannot find anyone reporting a similar issue
I have also noticed that the Summary dashboard shows no data for these instances for disk reads and writes, active sessions, active requests and active connections