Troubleshooting stability issue
jengelh at linux01.gwdg.de
Thu Aug 11 08:00:32 CEST 2005
>Symptom is that by the time we get to it, the box is totally unresponsive to
>local console, is not forwarding packets. In a word "hung".
Then there may be a memory leak. Calm all apps and periodically check the free
ram or the slab cache sizes, respectively. (Yeah, it's unlikely.)
Check /var/log/messages if it says that a network card timed out.
>Memory isn't obviously leaking.
>The number of lines in "ip_conntrack" does appear to grow with time, but is
>still way below (at around 3000) the maximum allowed of 32,000+, and isn't
>growing monotonically. I think there may be clues here, if only to what is
>wrong with the ruleset.
Reduce the maximum number of conntracks then.
>Apart from sshd, there is practically nothing running.
>inetd (this has nothing configured in /etc/inetd.conf, so I'll remove it).
>Postfix is listening on 127.0.0.1:25 in case anything local suddenly needs to
>report anything to me.
>lpd (lpd was running and not listening on any ports, so I'll remove it).
Where's the ftpd?
>Just looking for some helpful pointers on how to investigate this issue
>The hardware doesn't seem to like the stock 2.6 kernels, and I don't have one
>spare to spend time figuring out why.
Forgot a driver?
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