Brandon Hilkert:
> >> and when I send a mail, postfix says there's not enough space in the
> >> queue.
> >> Should I be doing it a different way?
> >
> > Postfix requires that the amount of space is several times larger
> > than the message size limit
> >
> > http://www.postfix.org/postconf.5.html#queue_minfree
> > http://www.postfix.org/postconf.5.html#message_size_limit
>
> I was able to get it to mount to tmpfs and it showed no change in
> performance, so that would theoretcially rule out any existing disk issue
> right?
tmpfs is backed by the swap file, which is on disk.
> >> My disk is writing about 3 MB/s which should be well within it's range. I
> >> would hope even larger, but I would like to work out the ramfs and test
> >> for
> >> sure.
> >
> > Bitrates are completely irrelevant.
>
> what is best to look out and compare?
When the disk is 100% busy, then it is the bottle neck. Disks can
be 100% busy jumping around doing very little I/O.
As Noel suggested in earlier email, try running smtp-sink which
does no disk I/O at all. If things are still slow, then the problem
is network or MS-Exchange configuration.
Wietse
