You mentioned Determining memory usage of a process..., which lists a second answer (for Linux). This would work without installing additional modules. You simply have to find out wether your ps has different options.

I'm on Windows, and based on Re^7: memory use array vs ref to array (or more probably Re: time and mem usage of pgm by the same author) I have scripts with
END {
    system qq(tasklist /v /fo LIST /fi "PID eq $$")
}

[download]
and 
END {
    system qq(wmic  PROCESS where "processid=$$" get * /FORMAT:LIST)
}

[download]
Perhaps one of these works for you?

In reply to Re: Memory and CPU utilization scripts without any installations of modules by soonix
in thread Memory and CPU utilization scripts without any installations of modules by Sekhar Reddy

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