[Dovecot] service_count=0 for imap and pop3

Mark Moseley moseleymark at gmail.com
Wed Nov 10 00:14:01 EET 2010

This is copy-pasted from Timo's comment in the "Todays Performance
Data for 2.0.x" thread, but I didn't want to hijack that thread. In
it, Timo says:

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

Is that safe to do in imap and/or pop3? Or at least no more insecure
than using service_count=0 for imap-login and pop3-login? Since I saw
that comment I've been googling around and grepping the wiki but I can
only find instances of using it with "service imap-login", not
"service imap" or "service pop3".

The mention in Timo's comment that it reduces the CPU usage by a lot
got my attention, esp for pop3. We're already using service_count=0
for pop3-login and imap-login.

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