timeouts when connecting to imap server

[Rudy Gevaert]

Timo Veith wrote:
> Rudy Gevaert wrote:
>> Some time ago we had some problems with sasl.  When to many users are
>> connecting sasl starts blocking because it hasn't enough entropy.
>> Recompile sasl so it uses /dev/urandom instead of /dev/random.
> 
> Hello Rudy,
> 
> thank you for your tip. I recompiled cyrus-sasl to use /dev/urandom 
> whereafter I restartet cyrus. First it looked like timeouts were gone, 
> because nagios reportet nothing. But then after a few hours the timeouts 
> where back. :(

Did you restart saslauthd?


> 
> I also tried to raise the prefork number (0->1), but then my users told me 
> that they could not connect to the pop server anymore. Others still 
> could. Also the imapproxy didn't work anymore. I changed prefork back to 
> zero and it was ok again.
> 
> What I haven't done before was raising the file descriptor limit. I read 
> about the setrlimit -1 thing in the archive and remembered that I should 
> be no problem. Anyway I raised the number from 1024 to 20480. Don't know 
> if that will help but my feeling was that maybe cyrus is waiting 
> somehow / somewhere because it cannot open anymore files and has to close 
> some before. Just guessing ...
> 
> Any more hints?
> 
> Timo
> 


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Rudy Gevaert          Rudy.Gevaert at UGent.be          tel:+32 9 264 4734
Directie ICT, afd. Infrastructuur ICT Department, Infrastructure office
Groep Systemen                    Systems group
Universiteit Gent                 Ghent University
Krijgslaan 281, gebouw S9, 9000 Gent, Belgie               www.UGent.be
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