[Dovecot] load increase after upgrade to 2.0.8

Ralf Hildebrandt Ralf.Hildebrandt at charite.de
Wed Dec 8 18:05:19 EET 2010

* David Ford <david at blue-labs.org>:

> gprof for detail, and even with simple strace timing.  i.e. strace
> -c.  if load is going up significantly, there should be one or more
> functions significantly fatter than the rest.  you can pick either to
> run it on the whole group, or just attach to certain processes.
> (master, imap, lda, etc)

Timo and I found excessive numbers of context switches, factor 20-30.
But it's unclear why the IMAP process would do/cause this.

> when you run 'ps aux|grep dovecot', what seems to collect the most cpu time?
> -d
> On 12/08/10 10:54, Ralf Hildebrandt wrote:
> >* David Ford<david at blue-labs.org>:
> >>Ralf, did you do the profiling yet?
> >With gprof or what exactly is on your mind?

Ralf Hildebrandt
  Geschäftsbereich IT | Abteilung Netzwerk
  Charité - Universitätsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  ralf.hildebrandt at charite.de | http://www.charite.de

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