On Fri, Mar 18, 2005 at 11:30:00PM +0100, Jakub Suchy said: > Hi, > i have really big problems running clamd on our mailserver. We have setup with > postfix + amavisd-new + clamd + spamassassin working for more than an year > with > no problems. > > Now (i didn't upgrade anything) after while (few minutes) of working, postfix > stops delivering emails and log says: > > Mar 11 16:54:19 service postfix/qmgr[8669]: 9454B1A3660: to=<xxx>, > orig_to=<yyy>, relay=none, delay=357, status=deferred (delivery temporarily > suspended: connect to 127.0.0.1 [127.0.0.1]: read timeout) > > It seems, that amavis can't connect to clamd socket, after restarting clamav > and flushing the queue, it works for while again, than read timeouts, and so > on... > > I tried searching google, this mailing list, but nothing relevant. Running > clamd in debug mode said nothing also... > > We are using: > postfix 2.1.5-0.backports > clamav 0.83-1.backports > clamav-base, clamav-daemon, clamav-freshclam, libclamav1 same versions > amavisd-new 20030616p10-4 + perl 5.8 > linux 2.4.27-1-686 > libc6 2.2.5-11.8 > zlibc 0.9j-3 > > Thanks for any help, our academic network with +3000 Win users is starting to > collapse without antivirus protection.
2 things to check - There is a known bug in the 0.83 release that improperly handles digest emails, iterating over the message over and over, in effect causing a DoS. This is fixed in CVS. Make sure you are allwoing enough connections and a queue of a decent length. Basically you want something like incoming_messages < ((MaxConnectionQueueLength * MaxThreads) + N ) Where N is 10% of simultaneous connections, give or take. Whether you want to increase the number of Threads or the size of your queue is a matter of experimentation and tuning. More threads will mean more system load, but messages tend to get processed faster. A longer Queue will result in some timeouts, but will allow clamd to manage it's load a little better. HTH, -- -------------------------------------------------------------------------- | Stephen Gran | Absence makes the heart grow frantic. | | [EMAIL PROTECTED] | | | http://www.lobefin.net/~steve | | --------------------------------------------------------------------------
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