Alexander Prohorenko wrote: [...]
Normally, everything works just fine, though, testing every message gets the server load high, but it's still okay. However, when the link of the server goes down, and mail spool gets 50 or more messages this cause server to stop answering any connections, etc, The load goes VERY high, and I suppose this to be a reason of server halt. If the SA is disabled, Exim works just fine even when it has 100 or more messages in the spool. Can I fix this by any way?
1: I have no experience whatsoever of BSD :-( but a lot with Exim 4 on RH Linux up to kernel 2.4.19. Yours is the config. that I was using till I swapped to SA-Exim.
It seems to me that you'll have to find out the exact cause of the seize up. Linux has strace, Solaris truss etc. and you can run Exim in debug mode as daemon with various different options. To alleviate things temporarily, you can set a maximum system load at which Exim 4 stops accepting connections (smtp 2xx) and gives a temporary error (4xx) until things have freed up. Look especially at what's happening to perl on the system. On a Linux machine, I'd run probably try to run spamd under strace to see what it was doing.
Also, you could configure Exim to use a split spool directory and see if that helps. Use the spec.txt doc to find out how to do both the load and split spool things.
There's probably a 4.20 Exim BSD port by now - Sheldon Hearne on the Exim list does those ports, I think.
2: This seems a question for the Exim list. There are ISPs and other high-load merchants running Exim under BSD and they could be more specific - so post this question to that list as well, if you haven't.
Best,
Tony
-- Tony Earnshaw
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