kalin mintchev wrote:
hi all..
i posted this question a few months back here and the only answer i got was to update the kernel which i did but it didn't solve the problem..
i have a redhat 9 machine that dies randomly. sometimes after a day, sometimes after 8 days. there isn't any indication of a problem in any of the logs. all the machine runs is qmail with spamd and some procmail and a bind name server. it also has a helix real media server but that was added a few weeks ago. there is a web server with webmail interface - squirrelmail - too. that's all. non of the logs show anything. there is enough disk space. i did a memory test which came out fine.
now having said that i heed to mention that a few weeks ago the machine had a second drive on which the main swap partition was living. that drive died and i had to create a swap file under /var on the main disk. i thought this will solve the problem but apparently it's not.
the machine is monitored 24 hours but sometimes people notice that the mail is down before the techs - just a minute or so after the machine dies. and rebooting it all the time is not solving the issue. of course i can rebuild the machine but it be nice to know what the problem might be..
can somebody provide some advice of where to start looking for a problem. i'd appreciate it.
also is there a way to find out what was the cpu load or memory usage at the time of the crash?
thank you...
I had this exact same problem a few months ago. Red Hat 9, qmail, SA, procmail. I also had fetchmail going ass well as a dyndns client (ddclient). I racked my brain for weeks I swear. I did all kinds of methodical testing to try to narrow down what process was causing it.
I can't be for certain exactly what fixed it, but I recall adding an MX record specifier in my ddclient.conf and then things were back to normal. It kind of made scense in a way. I recall determining that this problem only happened when qmail was running. One obvious simpton was that SA would take for ever (like 30-45 sec) to process one e-mail. I think it's also possible that running named (DNS) was also helpful, but I can't be certain.
Hope that helps.
Bill
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