[Dovecot] load increase after upgrade to 2.0.8

Timo Sirainen tss at iki.fi
Wed Dec 15 22:01:39 EET 2010

On 15.12.2010, at 19.42, Jerry wrote:

>> BTW. Postfix's behavior is similar (unsurprisingly, since I basically
>> copied its design for v2.0). I wonder how much of a problem this is
>> with Postfix. Is a similar patch or a kernel fix going to drop
>> context switches 10x there too?
>> http://marc.info/?l=linux-kernel&m=129243588809986&w=2
> Interesting. On a FreeBSD-8.2/amd64 system with Postfix (2.8-20101108)
> installed I have not noticed any difference. I am assuming that this
> problem does not affect FreeBSD systems.

Correct. Only Linux is affected.

Anyway, Postfix's design has been like this forever, so no one would have ever noticed context switch counts increasing. But changing this might make them notice that context switches are dropping.

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