[Dovecot] imap process consuming 100% CPU (Dovecot 1.0.3)

[Timo Sirainen]

On Tue, 2007-11-27 at 11:38 -0700, Jackie Hunt wrote:
> > Thanks for the suggestion on the truss command, Timo:
> >
> > "truss -d -rO -w1"
> 
> We have seen the imap process consuming 100% CPU again, and this time I
> was able to get a trace, but it's too long to post to the list.  I've sent
> a copy to Timo.  Let me know if anyone else would like a copy of it.
> 
> This user is running Thunderbird on Solaris, and has at least two
> IMAP connections open continuously, one to a UofW server running on
> Solaris (I think), the other to Dovecot running on AIX.  He has problems
> with the Dovecot connection hanging on him each morning.  Thunderbird
> shows an hourglass, but he gets not indication of what is happening.
> He has to shut down Thunderbird to get it working again.  It's a bit
> ironic/humorous, but his UofW connection is fine in Thunderbird, and
> that's how he notifies me his Dovecot imap is hung up.

Problem was that it was reading a 50MB mail in 12kB blocks, and Dovecot
wasn't handling that very well. Fixed:

http://hg.dovecot.org/dovecot-1.0/rev/0fba164c6ba6
http://hg.dovecot.org/dovecot-1.0/rev/edd95f9c6ba4

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