Really slow IMAP performance

2018-02-24 Thread Neil Jerram
Please could you help me to understand and fix why my dovecot IMAP performance is so bad? I've read through a lot of the performance-related material on the website, but I don't think that any of it could account for slowness at the level that I am seeing. The simplest scenario is moving a messag

Re: Really slow IMAP performance

2018-02-24 Thread Neil Jerram
Aki Tuomi writes: > On 24 February 2018 at 12:45 Neil Jerram < n...@ossau.homelinux.net> wrote: > > Please could you help me to understand and fix why my dovecot IMAP > performance is so bad? I've read through a lot of the > performance-related material on the

Re: Really slow IMAP performance

2018-02-24 Thread Neil Jerram
Aki Tuomi writes: >> On 24 February 2018 at 15:47 Neil Jerram wrote: [...] >> > Feb 24 10:24:24 arudy dovecot[1712]: imap(neil): Warning: >> > Transaction log file >> > /home/neil/dovecot-mail/.imap/INBOX/dovecot.index.log was locked >> > for 98 secon

Re: Really slow IMAP performance

2018-02-24 Thread Neil Jerram
Aki Tuomi writes: > Yes. You deffo are looking at several reasons for slowness. > > I can only recommend moving into maildir or sdbox format, and probably new > HDD too. > > https://wiki2.dovecot.org/Tools/Doveadm/Sync here is example of 'converting' > between mailbox formats using dsync. You s