It depends on your operating system more than Perl. Linux 2.6.14 introduced the /proc/pid/smaps magic file, which counts up "private" and "shared" memory usage, as well as "clean" and "dirty".

In this case, you want to know the amount of "private, dirty" pages you have. You can use the existing CPAN module Linux::Smaps to read these smaps files.

In reply to Re: Find total "actual" memory usage of forked processes by kyz
in thread Find total "actual" memory usage of forked processes by suaveant

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