A Pro/ENGINEER startup script can start vmstat(1) in the background, capture the sr column output, and calculate some meaningful statistics. The vmstat(1) process can be terminated, for example, by a signal sent to it when the Pro/ENGINEER session ends. Developing such a script is left as an exercise for the reader.
As an alternative, you can watch for the disk activity reported for the swap device (assuming you use swap partitions rather than files). One way to do this is to run the iostat(2) command. Any significant input/output (I/O) in a swap partition is a sure sign of memory shortage.
I also recommend installing the xcpustate utility and using it to graphically monitor what your system is doing. It is a public-domain X-Windows based utility available for many UNIX platform. You can download it from:
ftp://ftp.cs.toronto.edu/pub/jdd/xcpustate
The SPARC/Solaris binary that I use (which is rather old) is available here:
ftp://ftp.sunmde.com/pub/gregns/xcpustate
To use it, simply make sure the xcpustate file is executable:
chmod +x xcpustate
and then start it putting it into background:
xcpustate &
If you would like to watch the I/O state in addition to the CPU state (which is a good idea, especially for the swap devices), start it with a -disk parameter:
xcpustate -disk &
The resulting display will show the state of each CPU and disk (if -disk is specified). It uses the following colors for the display:
Green User time
Yellow System time
Blue Wait/idle
The xcpustate display is updated each second.
There are other graphical utilities to monitor system performance, but I like xcpustate the most for its convenience and light weight.
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