I have to monitor high processer&ram utilization Processes By OVO For this have to write a script so we need specific command for monitoring those perameters.
In my experience only gpm and extract give a realistic value for memory use. The ps value is pretty much spurious. The extract command output can be extremely long and you'll need to use cut to sensibly get the data you're after.
This is a command I using to report back a days worth of info for a particular process:
I'm no cpu tracking expert (sorry) -- but as always, I believe pstat exposes what you need.
Attached is a sample program that may work as-is or should be fairly easy to modify such that it will generate output for a wrapping/monitoring script. [Or just modify the program to take a time to sleep/rescan or something... your call].
Oh, and ps isn't that spurious if you know what you're asking for and what it is reporting (it is just calling pstat as it should).
Sepcifically, VSZ [from ps or the SIZE in top which amount to the same root] is the *virtual* size of the process. This has only bears on actual memory consumption in that it is rather hard to consume physical memory in a user process when you don't have a virtual mapping to affiliate with it. VSZ is nice to look at to get an idea of who/what is consuming Shared virtual address space (which is a scarce resource for 32-bit applications) or swap reservations (since by default virtual objects are required to be backed by swap reservations). SZ [or RES in top] is what you need to be looking at if you want to know what actual memory is being consumed.
Yes, SZ/RES isn't perfect -- there's some heuristic games played to try to share the "cost" of shared objects across all the attached processes so anyone summing across all processes won't wonder how that 32Gb database is suddenly present everywhere and their processes are 50x the actual RAM in the box. But if you're trying to monitor a process or see where the consumption lies per process or process group, that's going to get you in the right direction and is often sufficient.
Glance is always better and nice -- but ps isn't useless if you use it properly.
