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Re^3: understanding devel::leak

by Nova (Novice)
on Oct 05, 2007 at 15:57 UTC ( [id://642947]=note: print w/replies, xml ) Need Help??


in reply to Re^2: understanding devel::leak
in thread understanding devel::leak

Thank you for your responses and I apologize for the format problem in my previous post .
From the point of view of the O/S , I can see that , once I have done work via my script which requires MEM , a large chunk of that MEM may no longer be available to the O/S for concurrently running apps .
My perl app is running on WIN32 / ActiveState Perl 5.8.8 . Can I set any variables which would apply the -DPURIFY after Perl has already been compiled , or the binaries intalled .
Further , while the script is running is there a variable which can be examined which I can use to monitor MEM usage .
Kind regards, Nova .

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Re^4: understanding devel::leak
by almut (Canon) on Oct 05, 2007 at 21:38 UTC
    Can I set any variables which would apply the -DPURIFY after Perl has already been compiled

    Unfortunately not, it's a compile-time option only. You can read a bit more about this option and its primary use in perlhack, section External Tools for Debugging Perl.   Also, I suspect you'd incur a noticable decrease in performance with -DPURIFY (even when not running under Purify, valgrind, etc.); in other words, it's probably a matter of trading speed for memory control... (I haven't done any benchmarking, though.)

    is there a variable which can be examined which I can use to monitor MEM usage

    That would definitely be a nifty feature, but I don't think such a variable exists.   So, in addition to the respective system tools (like top on Unix — not sure what the best tool on Windows is), you might try the module GTop (based on libgtop from GNOME), but I don't know how well - if at all - that'd work on (native) Windows. Grepping through libgtop's configure file produces a couple of hits in connection with Cygwin and MinGW, but that's about all I can tell...

      Hi Almut , Thank you again for your thoughtful insights . I appreciate the points you have raised and will peruse the references you have included. In the past my apps ran on unix or linux machines , I have just recently begun testing some on windows machines , but the machines potentially have many other programs running on them , some quite MEM intensive , so I may have to be more innovative and careful about MEM usage and limits . Nova.

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