Cyrus lagging accepting IMAP connections

[Scott M. Likens]

On note #3, I imagine changing to a 2.6 kernel has to do with the
entropy pool in /dev/random as it differs in 2.4 from 2.6

Scott

Andy Fiddaman wrote:
> On Tue, 11 Sep 2007, Rick Kunkel wrote:
>
> ; # telnet mail 143
> ; Trying xxx.xxx.xxx.xxx...
> ; Connected to mail.
> ; Escape character is '^]'.
> ;
> ; And then it just kinda sits.  Sometimes, after 30 seconds or so
> ;
> ; * OK mail Cyrus IMAP4 v2.2.13-Debian-2.2.13-10 server ready
>
> Generally this kind of delay is due to one of the following things:
>
> o DNS problem
>   The reverse DNS lookup is timing out for the client, or the server
>   interface (if using virtualdomains).
>
> o Insufficient entropy for sasl
>   When a lot of users are connecting, sasl can block because it hasn't
>   enough entropy - recompile SASL to use /dev/urandom instead of
>   /dev/random.
>
> o Linux 2.6 kernel
>   Some people have reported this with Linux 2.6 and solved it by reverting
>   to 2.4, I haven't seen any details on exactly what the problem is
>   though..
>
> HTH,
>
> A.
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