SysAdmin put forth on 4/24/2010 4:28 AM:
Dnia Sat, 24 Apr 2010 11:03:15 +0200 Hanspeter Kunz hkunz@ifi.uzh.ch napisał(a):
Clearly, this is either a problem with my configuration or something which should be improved in roundcube.
I think, there is something wrong with your roundcube or IMAP server. I can delete messages in sequence with no noticeable delay.
Sounds like his connection concurrency on his imap server is set too low. I can consistently duplicate this long command delay behavior by setting mail_max_userip_connections = 1 or max_mail_processes = 1 in dovecot and connecting with a default TBird client which makes 5 concurrent imap connections upon startup.
I can't duplicate this problem with my RC server as it runs on the same host as dovecot, thus bypassing the TCP stack. Since the connection isn't through TCP, none of dovecot's concurrency limits are triggered. They only apply to remote imap connections.