Ok, I'm seriously confused ;-)
I created a startup.pl that allocated 10MB and a handler that
allocated 20MB. I removed all other vhosts on the machine and didn't
preload any modules.
On an OS X box running Apache 1.3 (not directly comparable but all I
had to hand):
10mb startup.pl
root 2902 0.0 0.4 57664 6872 ?? Ss 9:51PM
0:00.18 /usr/sbin/httpd
www 2903 0.0 0.0 47696 676 ?? S 9:51PM
0:00.00 /usr/sbin/httpd
www 2904 0.0 0.0 47696 676 ?? S 9:51PM
0:00.00 /usr/sbin/httpd
one 20mb hit later
root 2902 0.0 0.4 57664 6460 ?? Ss 9:51PM
0:00.18 /usr/sbin/httpd
www 2903 0.0 2.8 89692 43672 ?? S 9:51PM
0:00.13 /usr/sbin/httpd
www 2904 0.0 0.0 47696 608 ?? S 9:51PM
0:00.00 /usr/sbin/httpd
And now on a FreeBSD 6.0 box running Apache 2:
10mb startup.pl
root 64655 2.4 5.8 97408 60564 ?? Ss 10:14PM 0:00.35 /usr/
local/sbin/httpd
www 64656 0.0 5.8 97408 60576 ?? S 10:14PM 0:00.00 /usr/
local/sbin/httpd
www 64657 0.0 5.8 97408 60576 ?? S 10:14PM 0:00.00 /usr/
local/sbin/httpd
one 20mb hit later
root 64655 0.0 5.8 97408 60564 ?? Ss 10:14PM 0:00.35 /usr/
local/sbin/httpd
www 64657 0.0 5.8 97408 60576 ?? I 10:14PM 0:00.00 /usr/
local/sbin/httpd
www 64835 0.0 5.8 97408 60576 ?? S 10:15PM 0:00.00 /usr/
local/sbin/httpd
I'm not clear on how these numbers are interpreted, but it looks to
me that the FreeBSD is allocating all 30MB at startup. Have I missed
something in httpd.conf that will cause this? It also looks like
64656 has been replaced by 64835 but I don't see any errors in the
error log.
If I then modify the handler to return the $max_rss and $max_ixrss
from BSD::Resource:
10mb startup.pl
root 65678 15.9 5.8 97408 60564 ?? Ss 10:32PM 0:00.35 /usr/
local/sbin/httpd
www 65679 0.0 5.8 97408 60576 ?? S 10:32PM 0:00.00 /usr/
local/sbin/httpd
www 65680 0.0 5.8 97408 60576 ?? S 10:32PM 0:00.00 /usr/
local/sbin/httpd
one 20mb hit later
root 65678 4.5 5.8 97408 60564 ?? Ss 10:32PM 0:00.35 /usr/
local/sbin/httpd
www 65679 2.2 9.8 163224 101764 ?? S 10:32PM 0:00.14 /
usr/local/sbin/httpd
www 65680 0.0 5.8 97408 60576 ?? S 10:32PM 0:00.00 /usr/
local/sbin/httpd
Where did 163MB come from?!
That handler prints (max_rss, then max_ixrss):
101700 # stays the same
4 # goes up 2 or 3 each time
On OS X it said both were 0, which I presume means it doesn't work
properly on OS X.
root 60641 22.6 5.8 73068 60492 ?? Ss 8:25PM 0:02.08
73MB thats nothing for mod_perl + php its fairly typical actually.
That's somewhat reassuring.
These numbers seem really high to me. I have both mod_perl and
mod_php installed and am running two perl sites and four php sites.
You should separate these out to separate apache instances....
unless you've a good
reason not to.
I've been meaning to do something like that for while, but I work on
something else during the day so my only reason is a lack of time.
What benefits can I expect from doing this? The only things that
searching have turned up are that a years ago they stamped all over
each other but I haven't had any such issues so I assume that has
been fixed.
Thanks for your help.
Jonathan
