[Dovecot] dsync incredibly slow
Hi!
While performing a dsync from cyrus imap to dovecot 2.2.12, dsync seems to stop for perhaps a minute without disk / cpu / memory activity (that I can see). This happens several times per sync per user so it takes an enormous amount of time to sync just a couple of gigs of mail.
dsync -D -v -o mail_fsync=never mirror -f -R -u user@example.com imapc:
What could possibly be the cause of this slowness? Is it protocol dependent or just dsync it's self?
Thanks!
W dniu 23.05.2014 10:48, Alan McGinlay pisze:
Hi!
While performing a dsync from cyrus imap to dovecot 2.2.12, dsync seems to stop for perhaps a minute without disk / cpu / memory activity (that I can see). This happens several times per sync per user so it takes an enormous amount of time to sync just a couple of gigs of mail.
dsync -D -v -o mail_fsync=never mirror -f -R -u user@example.com imapc:
What could possibly be the cause of this slowness? Is it protocol dependent or just dsync it's self? Hi! "Use the strace, Luke";) Use `strace -f -tt -T -s 512 dsync ....<other parameters>" and look what dsync does (when does nothing;))
participants (2)
-
Alan McGinlay
-
Marcin Mirosław