The standard answer....
it depends
Where are the bottlenecks in your system?
Do you deliver mainly to disk, is mail just transiting through, do you
do a lot of lookups etc...
Typically a mail system hits disk limitations first - mainly on the
queue directory, however the main maildrop directory may also be a
bottleneck if on the same machine.
Ways of fixing this are to spread load over more and faster disks -
Linux RAID is pretty good for this, or a hardware RAID system.
There are tools around to measure this sort of thing - there is a
vmstat now as part of linux.
More CPU is unlikely to help much unless you have a particularly CPU
bound system.
Other things that may help:-
- disk queue layout - split_queue
- fs used on disks - maybe look at reiserfs
- putting the queue onto a fast disk system
- raid 0 or 5
Nigel.
--
[ Nigel Metheringham Nigel.Metheringham@??? ]
[ Phone: +44 1423 850000 Fax +44 1423 858866 ]
