[Dovecot] load increase after upgrade to 2.0.8

Ralf Hildebrandt Ralf.Hildebrandt at charite.de
Wed Dec 15 18:43:55 EET 2010

> Attached patch should workaround this. The main problem with it is that
> Dovecot doesn't die very easily after this. You have to kill all the
> processes manually. I'll probably have to add yet another pipe just for
> this.

Yes. Plenty of killall's are now needed!

So what does this patch actually do?

All client processes used to check on the master's status FD to check
if it is still alive. And you disabled that?

> But I wonder if this could be considered a kernel bug too? I think I'll
> write a small test program and see what lkml thinks about it. Oh, and
> seeing if other operating systems handle it better would be interesting
> too.
> BTW. I actually considered this already last week but then I thought it
> can't be it since v1.2 did the same thing. But no, v1.2 doesn't really
> do the same thing.


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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