server is crashing constantly
ivoras at freebsd.org
Sun Sep 14 11:55:08 UTC 2008
Jonathan Horne wrote:
> I have a new web server for a moderately high traffic website that i have recently deployed for a friend. it has apache22, php5, and mysql50 on it (latest from ports). this server is crashing 2-3 times a day, and thus far i have no idea where to start troubleshooting this.
> That is what im getting in the /var/log/messages.
> Sep 13 20:09:25 rps savecore: reboot after panic: page fault
> Sep 13 20:09:25 rps savecore: writing core to vmcore.0
> Here is the uname:
> FreeBSD rps.rangerpowersports.com 7.0-RELEASE-p4 FreeBSD 7.0-RELEASE-p4 #0: Fri Sep 5 01:58:09 CDT 2008 root at rangerpowersports:/usr/obj/usr/src/sys/RPS i386
> Any ideas or recommendations about where to start looking to track this down would really be appreciated.
Enable dumpdev and dumpdir in rc.conf, here's the manual excerpt:
dumpdev (str) Indicates the device (usually a swap partition) to
which a crash dump should be written in the event of a
crash. If the value of this variable is ``AUTO'', the
suitable swap device listed in /etc/fstab will be used as
dump device. Otherwise, the value of this variable is
as the argument to dumpon(8). To disable crash dumps, set
this variable to ``NO''.
dumpdir (str) When the system reboots after a crash and a crash
is found on the device specified by the dumpdev variable,
savecore(8) will save that crash dump and a copy of the
nel to the directory specified by the dumpdir variable.
default value is /var/crash. Set to ``NO'' to not run
savecore(8) at boot time when dumpdir is set.
Then, when it crashes, inspect the dump. See here:
If you suspect it's a FreeBSD problem and not a hardware problem, you'll
need to send debugging data similar to that in the example in handbook.
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