I have been monitoring a server and trying to resolve an issue we are experiencing. The server is a file server with a NAS attached. Randomly at different times users complain about the server freezing and consequentially rebooting the server is the only option. After rebooting the server the issue is resolved until the next time. I looked at Perfmon and all looks ok with the exception of Memory\Cache Bytes counter which is over 300mb. I have a couple of questions regarding this issue. Sorry for my ignorance but How can you tell if the operating system is using a paging file? Second questions is I know as far as the paging file it is 1.5 times the memory. I have seen websites that say put it on the c drive, others say the drive of the app and others a different drive. What is the rule of thumb here. I am using a server 2008 64 bit server.