imapsync very poor performance

[Matt Moldvan]

In your mount options, try using the "noatime" option.  You can probably
apply this with a "mount -o remount,noatime /dev/something /mnt/somewhere",
then restart dovecot for fun and try again.  Is the original system you are
having trouble with also a VM?  If so, change to scheduler for the disk
drive it's mounted on to "noop":

[someone at somewhere #] cat /sys/block/somedrive/queue/scheduler
noop deadline [cfq]
[someone at somewhere #] echo noop > /sys/block/somedrive/queue/scheduler
[someone at somewhere #] cat /sys/block/somedrive/queue/scheduler
[noop] deadline cfq


On Mon, Dec 2, 2013 at 7:26 PM, Franz Skale <i.bin at dah.am> wrote:

> Check your filesystem and I/O errors in dmesg. Check for the maildirs.
> A punch of posibilities.
>
>
> Rgds Franz
>
> Telepathisch gesendet
>
> Am 03.12.2013 um 00:24 schrieb Christian Hügel <
> christian.huegel at stonebyte.de>:
>
> > Thx, I get a bunch of errors like this one:
> >
> > [pid  6801] <... read resumed> "121 SELECT INBOX.User\r\n", 1639) = 24
> > [pid  6800] <... read resumed> 0x17189520, 5) = -1 EAGAIN (Resource
> > temporarily unavailable)
> > [pid  6801] close(14 <unfinished ...>
> > [pid  6800] epoll_wait(8,  <unfinished ...>
> > [pid  6801] <... close resumed> )       = 0
> >
> >
> > Am 02.12.2013 23:46, schrieb Franz Skale:
> >> strace -f -s 16384 dovecot -F 2>/tmp/dovecot.debug
> >
> > --
> > -------------------
> > OpenPGP: 0x1F814CFD
> > Threema: ZKZ2WZR7
> > <0x1F814CFD.asc>
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