On Tue 29 Sep 2009, Clinton Gormley wrote: > > I'm wondering if anyone can advise me on how I could go about > > trying to understand where this 90 Mbs is comming from? Some of it > > must be the mod_perl and apache binaries - but how much should they > > be, and apart from the 6mb in shared memory for my pre-loaded > > modules, where is it all comming from? > > You don't mention what platform you are on, but if it is linux, then > check out this blog > > http://bmaurer.blogspot.com/2006/03/memory-usage-with-smaps.html > > and specifically this script > > http://www.contrib.andrew.cmu.edu/%7Ebmaurer/memory/smem.pl > > > which will give you a much more accurate idea about how much memory > is shared and where it is being used.
But keep this in mind: http://search.cpan.org/~opi/Linux-Smaps-0.06/lib/Linux/Smaps.pm#A_special_note_on_copy_on_write_measurements There is another device that could be helpful. On newer kernels (don't remember when) there is a "Referenced" field in /proc/PID/smaps. It counts the kilobytes accessed since the last write to /proc/PID/clear_refs (or since the start of the program). Torsten -- Need professional mod_perl support? Just hire me: torsten.foert...@gmx.net
