Re: Increasing mail_max_userip_connections and sys resources

[Nikolaos Milas]

On 14/1/2016 7:19 μμ, Nikolaos Milas wrote:

2. Could another dovecot setting prevent the above setting from being 
applied (e.g. due to connections exhaustion), i.e. should we also 
change other setting(s)? 

An associated question:

I tried adding "process_limit = 2048" to imap:

   protocol imap {
      imap_client_workarounds = "delay-newmail"
      mail_plugins = quota imap_quota notify replication
      process_limit = 2048
      mail_max_userip_connections = 100
   }

but this leads to:

   # doveconf -n

   # 2.2.18: /etc/dovecot/dovecot.conf
   # Pigeonhole version 0.4.8
   doveconf: Fatal: Error in configuration file
   /etc/dovecot/dovecot.conf line 30: Unknown setting: process_limit
   doveconf: Error: managesieve-login: dump-capability process returned 89
   doveconf: Fatal: Error in configuration file
   /etc/dovecot/dovecot.conf line 30: Unknown setting: process_limit

However, here: 
http://wiki.dovecot.org/Services#imap.2C_pop3.2C_managesieve I read:

   imap, pop3, managesieve

   process_limit defaults to 1024, which means that the number of
   simultaneous IMAP (or POP3 or ManageSieve) connections is limited by
   this setting. If you expect more connections, increase this value.

So, I was not expecting this error and can't see what's the problem.

Why "process_limit" is an unknown setting? What am I doing wrong?

Please clarify!

Thanks,
Nick