Date: Fri, 24 Feb 2006 14:50:15 +0100 From: Ivan Voras <ivoras@fer.hr> To: freebsd-stable@freebsd.org Subject: Hyperactive pagezero Message-ID: <43FF0F17.1070800@fer.hr>
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On a very loaded web server (httpd processes are huge because PHP uses
lots of shared memory) the pagezero process seems to constantly take up
to 30% of CPU time (this is 2-CPU SMP machine):
PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
12 root 1 171 52 0K 8K RUN 0 220.0H 35.74% idle:
cpu0
61 root 1 -16 -135 0K 8K pgzero 0 679:47 27.83% pagezero
35199 www 1 122 0 71132K 42140K CPU1 1 0:35 26.56% httpd
35541 www 1 96 0 51452K 22452K select 0 0:21 15.14% httpd
11 root 1 171 52 0K 8K RUN 1 192.5H 14.94% idle:
cpu1
35391 www 1 20 0 63368K 34272K lockf 0 1:02 3.56% httpd
35467 www 1 97 0 50772K 20768K select 0 0:23 2.05% httpd
35447 www 1 98 0 51724K 22956K select 0 0:04 1.76% httpd
35390 www 1 20 0 51140K 22708K lockf 0 0:27 1.37% httpd
44 root 1 -44 -163 0K 8K WAIT 1 161:04 1.27% swi1: net
This is:
FreeBSD myserver.net 6.1-PRERELEASE FreeBSD 6.1-PRERELEASE #2: Sun Feb
5 00:07:27 CET 2006
I have 'aj' linked as /etc/malloc.conf.
Any ideas on why this is so? 30% CPU just seems way too much for such thing.
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