I have an HP Proliant ML370 Windows Server 2003 Standard Edition. It has 1.5
GB Ram and a Xeon 2.8 processor in it. I have a Raid 5 of 327 GB. My free
disk space is low, not sure what it should be, I heard somewhere 20% would be
good??

I have been having issues where user's are seeing very poor performance.
They start calling because their systems "freeze" while saving files to the
server. When this happens it affects multiple users, not just one particular
user. During these "poor" performance times I cannot access the server via
RDP to see what is happening on the server. I had the idea of using
performance montior and alerts. Unfortunately I do not know what would be
proper thresholds for knowing there is an issue. I also just have a system
monitor running.

The items I am watching with alerts are

Memory Pages/Sec
Logical Disk Avg Disk Queue Length
Logical Disk Total % Disk Time
Network Interface Bytes/Sec
Paging File % Usage
Processor % Processor Time

Any direction in this area, or other direction about determining what the
issue is would be great. It does not seem to follow a pattern of when it
happens, it just happens "randomly". I know it is not random, but that is
how it appears.

TIA