On Tue, 20 Sep 2005 10:13:39 +1200 [EMAIL PROTECTED] wrote: > Hi > > I've set up mod_perl v1.29 with apache 1.3.33 and I'm trying to > maximise the amount of memory shared between the httpd processes. > > I've created a startup.pl file and have entered all modules I use, and > > have loaded the specific the DB driver etc. I'm not using CGI, and > only one custom module is installed (which in turn uses the CPAN > modules in the startup file) > > The problem I have is the top and ps commands don't give the shared > memory size. However, if I issue > > ipcs -m > > there are no shared memory segments. Should mod_perl make use of them? > > Likewise, when I issue > > /usr/proc/bin/pmap <apache proc_id> | grep "shmid" > > no shared memory is listed. > > The problem is, each http process seems to be about 18M. This isn't a > big deal if most of the memory (even half) is shared, but it doesn't > seem to be as far as I can tell. > > Any advice on memory use on Solaris is appreciated
Hi Dan, When talking about mod_perl and "sharing" we aren't talking about SysV shared memory that you'd use in IPC. By pre-loading all of your modules each Apache child shares all of the common code and only has one copy of each module in RAM. This way the only RAM consumed by each Apache child is only the child specific memory, such as per request information, temporary variables, etc. Hope this helps. --------------------------------- Frank Wiles <[EMAIL PROTECTED]> http://www.wiles.org ---------------------------------
