Re: Prefork not sharing on FreeBSD, but sharing on OSX ?

[Jonathan <suppressed>]

On Aug 24, 2006, at 2:59 AM, Philip M. Gollucci wrote:
> Every one of those looks as I would expect.

really?  i'd expect the memory usage to be more uniform

> RSS is not shared RAM, but memory resident -- the rest in is  
> swapped out.
yeah, i didn't finish the gtop tests yet.  i kind of passed out.

they're extremely odd for 2 reasons:

	a- ubuntu's shared memory increased after 1 request.  i tried a few  
different times.  every time i saw an increase in shared, from a few  
k to 5mb
	b- freebsd is showing a larger resident than size
	c- LARGE difference in what gtop is reporting as shared
		ubuntu is showing a size 42mb
			30mb shared
			12mb per child
		freebsd is showing a size of 46mb
			8mb shared
			38 unshared

--------

Ubuntu

Startup ps
	root      4722  4.3 17.5  41264 33464 ?        Ss   04:32   0:04 / 
usr/sbin/apache2 -k start
	www-data  4726  0.0 16.2  41264 31104 ?        S    04:32   0:00 / 
usr/sbin/apache2 -k start

Request 1 GTOP: (4726)
        ->size 42389504
        ->vsize 42389504
        ->resident 33120256
        ->share 2961408
        ->rss 33120256

root      4722  3.0 17.5  41264 33464 ?        Ss   04:32   0:04 /usr/ 
sbin/apache2 -k start
www-data  4726  0.1 16.9  41396 32412 ?        S    04:32   0:00 /usr/ 
sbin/apache2 -k start

Request 2 GTOP: (4726)
        ->size 42389504
        ->vsize 42389504
        ->resident 33189888
        ->share 2998272
        ->rss 33189888

root      4722  2.5 17.5  41264 33464 ?        Ss   04:32   0:04 /usr/ 
sbin/apache2 -k start
www-data  4726  0.1 16.9  41476 32440 ?        S    04:32   0:00 /usr/ 
sbin/apache2 -k start


FreeBSD 6

Startup ps
	root     93830 15.8  5.1 54928 51616  ??  Ss    4:44AM   0:02.42 / 
usr/local/sbin/httpd
	www      93834  0.0  5.1 54984 51672  ??  S     4:44AM   0:00.01 / 
usr/local/sbin/httpd

Request 1 GTOP: (93834)
        ->size 46534656
        ->vsize 46534656
        ->resident 52944896
        ->share 8184509
        ->rss 52944896

root     93830  0.0  5.1 54928 51616  ??  Ss    4:44AM   0:02.42 /usr/ 
local/sbin/httpd
www      93834  0.0  5.1 55200 51852  ??  S     4:44AM   0:00.09 /usr/ 
local/sbin/httpd

Request 2 GTOP: (93834)
        ->size 46727168
        ->vsize 46727168
        ->resident 53059584
        ->share 8184509
        ->rss 53059584

root     93830  0.0  5.1 54928 51616  ??  Ss    4:44AM   0:02.42 /usr/ 
local/sbin/httpd
www      93834  0.0  5.1 55200 51852  ??  S     4:44AM   0:00.11 /usr/ 
local/sbin/httpd