redhat 9 hangs

[Daniel Buggie]

On Fri, 2004-07-16 at 11:38, kalin mintchev wrote:
> hi all...
> 
> i have a problem with a (more or less) new install of redhat 9.
> the machine is being used as mail server and webmail delivery.
> it has qmail as local smtp, pop and receiving mail, spamassassin using
> only spamd, curier-imap server, bind, and an apache for the webmail -
> squirrelmail.
> 
> what happens is that the machine hangs randomly. usually it's in the early
> mornings but there isn't any pattern. there is nothing in the logs that i
> can get any clue of where the problem is. messages, maillogs, cron,
> xferlog - all of them are normal. i was suspecting spamd but the log
> entries for it in maillog are not when the hang starts. nor there is imap
> records in the log at that time. hardware maybe? how do i know that?
> 
> so i don't know where to begin checking and i'd appreciate any advise or
> help i can get.
> 
> thanks...

You might want to try a memtest86 ( http://www.memtest86.com/ ) or the
torture test option in prime95 ( http://www.mersenne.org/ ). Both
processes are pretty good at detecting CPU/Memory problems.

Also, you could use smartctl to take a look at the hard disks.  Perhaps
also Bonnie++ if you want to apply some load to the drives to see how
they react.

Hope that helps.

Daniel