Sometime back, I received a request about Appdynamics not fetching data in windows server 2016 but it works fine in other operating systems. To give you a background, Appdynamics fetches data via WMI scripts, which inturn obtain data from perfmon counters in regular time intervals.
I was presented with the following metrics for WMI scritps(written in VB) used by appdynamics and clearly shows windows 2016 is slower.
Appdynamics vendor provided proof that it works in other companies where same OS was hosted.
So the challange is to debug in our environment, I took an approach to trace all the system calls using procmon to determine the rootcause.
Root cause of this WMI script slowness in 2016 is due to MacAfee interfering with the process. If you see the snapshot above, McAfee took 352 sec which attributes to 90% of the total time. The same behavior is not found in 2012 version.
Mcafee accepted the issue and gave us a patch which resolved the problem.
Debugging is always fun :)
