Re: understanding memory via ps -ely | grep http
[EMAIL PROTECTED] wrote: > What's about FreeBSD? > If shared memory is not compiled in kernel of FreeBSD I cant use GTop > module because of absant of shared memory. > So I dont know is there performance affect or not. You do not have shared memory enabled in your kernel? Any reason? I'd say that most Unix machines in the world have use for shared memory at some point in time, it's a pretty safe thing to enable. Anyway, the "share" thing in GTop is not about "SysV shared memory IPC", but rather about memory shared between related processes (if they load the same libraries for example, the kernel could share the read-only parts of the library between the two processes instead of loading two copies, thus saving memory). -- "There are two major products that come out of Berkeley: LSD and Unix. We don't believe this to be a coincidence." -- Jeremy S. Anderson
Re: understanding memory via ps -ely | grep http
On Tue, 20 Mar 2001, Tim Gardner wrote: > I have been trying to reduce/tune the memory requirements of an > online game which uses mod_perl (Apache::Registry). I have read the > suggestions at http://perl.apache.org/tuning/ and am trying to follow > them. The first suggestion is to preload the modules by including > > Perlrequire /var/www/perllib/startup.perl > > in httpd.conf and then in startup.perl doing: > > #! /usr/local/bin/perl > use strict; > use lib "/var/www/perllib"; > use Apache::DBI (); > use mymodules (); > 1; > > According to the web page: > >What this does is pull in all of the code used by the programs (but > >does not import any of the module methods) into the main HTTPD > >process, which then creates the child processes with the code > >already in place. > > I have been monitoring memory usage with the command: > ps -ely | grep http > > and getting output that looks something like this. > > S UID PID PPID C PRI NI RSS SZWCHAN TTY TIME CMD > S 1003 318 1 0 40 18 4432 40960? ?4:37 cshttpd > S 1003 345 318 0 40 18 3320 40920? ?0:02 cshttpd > S 0 2835 1 0 41 20 8776 10344? ?0:34 httpd > S 60001 4895 2835 0 41 20 13272 18872? ?0:06 httpd > S 60001 4894 2835 0 41 20 13280 18872? ?0:07 httpd > > I understand that the RSS is the resident size in KB and the SZ > column is the size of the process, but what should I be seeing in the > way of reduced memory? The 13MB/18MB is not much different from when > I don't preload anything. Should I be seeing something else? I > probably am not understanding what to look for. Any suggestions or > observations would be appreciated. You want to read the first sections of: http://perl.apache.org/guide/performance.html particularly: http://perl.apache.org/guide/performance.html#Know_Your_Operating_System _ Stas Bekman JAm_pH -- Just Another mod_perl Hacker http://stason.org/ mod_perl Guide http://perl.apache.org/guide mailto:[EMAIL PROTECTED] http://apachetoday.com http://eXtropia.com/ http://singlesheaven.com http://perl.apache.org http://perlmonth.com/
Re: understanding memory via ps -ely | grep http
On Tue, 20 Mar 2001, Tim Gardner wrote: > I understand that the RSS is the resident size in KB and the SZ > column is the size of the process, but what should I be seeing in the > way of reduced memory? The 13MB/18MB is not much different from when > I don't preload anything. Should I be seeing something else? You have to look at SHARE. Subtract SHARE from RSS. - Perrin
