We are experiencing issues with instability on some of our Windows 2003 32-bit TS'.
After a lot of Googling my suspicions are that it is running out of Page Table Entries (PTE's).
From what I can gather this is a problem when using /3gb switch on Windows 32-bit servers, and with TS' you can easily hit the limit.
How can you verify that this is what is happening? I have no experience with perfmon and limited experience with Process Explorer, and I don't really know what I am looking for.
More info: Always, the task manager process list is empty when this happens, also memory counters are blanked. The server typically have only around 65 users when this happens, but they run MSO and different accounting software. Some of which is pretty badly written and bloated. Common memory usage per user is 200-600 MB, but our servers never run out of available RAM. A few printers are installed on the servers, sometimes up to 20. The servers have been running smoothly with 70-80 users a few years back, but have been scaled down as its seemed to stabilize them.