On Wed, Feb 02, 2000 at 09:44:02AM -0500, Len Budney wrote:
> Jeremy Hansen <[EMAIL PROTECTED]> wrote:
> >
> > Is there any kernel sysctl or otherwise parameters suggested for
> > performance using qmail on Linux? Open file handle limits, share
> > memory, whatever? I have a goal to send at least 1 million emails in
> > a 24 hour period from a single machine.
>
> The main suggestion has already been made: raise concurrencyremote to
> 255 and buy lots of memory.
>
> If money is not an object, you can also install several SCSI drives
> and stripe /var/qmail/queue across those disks. (Mount the filesystems
> with the "sync" option, for reliability.) Disk I/O is a potential queue
> bottleneck, especially on one-disk Linux boxen. Also, you might want to
> look for faster filesystems than ext2--but what, I'm not sure.
I strongly _dis_recommend mounting ext2fs filesystems sync. The system
I described earlier had _terrible_ performance at first, it turned out this
was because I followed the FAQ and mounted it sync.
Yes, mounting it async is bad for reliability, so decide for yourself.
Greetz, Peter.
--
Peter van Dijk - student/sysadmin/ircoper/madly in love/pretending coder
|
| 'C makes it easy to shoot yourself in the foot;
| C++ makes it harder, but when you do it blows your whole leg off.'
| Bjarne Stroustrup, Inventor of C++
