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

[Timo Sirainen]

On Sun, 2007-10-21 at 00:47 +0300, Timo Sirainen wrote:
> On Wed, 2007-10-10 at 10:50 -0600, Jackie Hunt wrote:
> > Attached is the truss for the imap process we are seeing which is
> > chewing up CPU.  We've seen this issue on several different clients,
> > usually first thing in the morning.  Shutting down the client and
> > restarting always seems to get Dovecot back in sync.   Hope we can
> > get some help with this.   We're running 1.0.5.  Thanks!
> 
> The truss output looks like Dovecot re-reads the entire mbox file for
> each FETCH command. Did you use NFS? Do you have mbox_dirty_syncs=yes
> (default)?
> 
> Anyway this isn't an infinite loop in Dovecot. It's processing multiple
> FETCH commands. Maybe the client got stuck somehow and just keeps
> sending the same command over and over again? Would have been nice to
> see the entire FETCH command and its output. "truss -r0 -w1" does that I
> think.

"truss -d -r0 -w1" for future reference. That includes nice timestamps
and also shows the IMAP traffic.

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