Re: IMAP hibernate and scalability in general

24 Apr 2017


      Hello,
Just to follow up on this, we've hit over 16k (default client limit here)
hibernated sessions:
dovecot   119157  0.1  0.0  63404 56140 ?        S    Apr01  62:05 dovecot/imap-hibernate [11291 connections]
dovecot   877825  0.2  0.0  28512 21224 ?        S    Apr23   1:34 dovecot/imap-hibernate [5420 connections]
No issues other than the minor bug I reported, CPU usage is slight (at
most 2% of a CPU core), memory savings are immense, so I'm a happy camper.
Just out of curiosity, how does dovecot decide to split and spread out
sessions between hibernate processes?
It's clearly something more involved than "fill up one and then fill up
the next" or we would see 16k on the old one and a few on the new one.
Christian
Christian Balzer        Network/Systems Engineer

chibi@gol.com   	Global OnLine Japan/Rakuten Communications
http://www.gol.com/

Re: IMAP hibernate and scalability in general

Christian Balzer

Just to follow up on this, we've hit over 16k (default client limit here) hibernated sessions:

dovecot 119157 0.1 0.0 63404 56140 ? S Apr01 62:05 dovecot/imap-hibernate [11291 connections] dovecot 877825 0.2 0.0 28512 21224 ? S Apr23 1:34 dovecot/imap-hibernate [5420 connections]

Christian