Hi,
we experience a wierd behaviour on couple of our Terminal Server which are used to run NAVISION (running Windows Server 2003 x64 SP2).
They just hang and freeze: you can't connect to it using RDP, but you can view current connections using Terminal Services Manager (and even remotely connect to some sessions: sometimes it does connect, sometines don't.. But when it does you can't open Task Manager, but sometimes NAVISION does responding).
It happens at peak time during the day, when max number of users are connected, but also happens at night time, when only 10-15 users are working.
We are monitoring these servers using SCOM 2012, but no alert comes during that time.. Events with ID 21402 and 201403 are recurring during the freeze time under Operations Manager Log.
I would try to log more counters with PerfMon, but when servers hangs we do hard reset and all data are lost, because I can't stop performance data collection..
Any ideas what could be the cause of this behavior?
There are couple screens from SCOM performance view which I found intereting:
LogicalDisk C: - %\IdleTime
Memory - pages\sec: