[Dovecot] Todays Performance Data for 2.0.x

[Ralf Hildebrandt]

* Timo Sirainen <tss at iki.fi>:
> Dividing the imap processes's system CPU usage by number of imap
> processes:
> 
> imap : 0.478872 of 975
> imap : 0.460797 of 1242
> imap : 0.409641 of 2482
> imap : 0.424035 of 4711
> imap : 0.488494 of 6148
> imap : 0.56809 of 7031
> imap : 0.734864 of 6965
> 
> So it's about 0.5 seconds of system CPU per imap login. I also get
> something like 0.3 seconds of system CPU per imap login on my system.

OK

> Also setting:
> 
> service imap {
>   service_count = 0
> }
> 
> (i.e. reuse imap processes) reduced the system CPU usage to almost
> nothing. But if you use different UIDs for different users you can't do
> that.

Yes, unfortunately :(

> So, yeah, looks like the process initialization is wasting time
> somewhere. I'll look further into it.

Thanks a lot!

-- 
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