> Our director has been complaining about the performance while accessing
> his mail. As such, we've begun the process of evaluating our entire
> mail infrastructure to find out where the possible bottlenecks might be.
May be the main bottleneck is your disk.
Check for disk i/o wait time with an utility like "iostat" (comes with
"sar", "sysstat" package in debian)
Look at the %iowait field, Ex:
dAm2K:/home/dino# iostat
Linux 2.6.26-1-686 (dAm2K) 25/10/2008 _i686_
avg-cpu: %user %nice %system %iowait %steal %idle
14,08 0,01 4,00 4,58 0,00 77,33
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
hda 17,04 475,03 281,62 443636 263012
hda1 0,09 2,64 0,00 2461 0
hda2 0,03 0,60 0,00 562 0
hda3 0,06 0,51 0,00 476 2
hda4 16,83 470,95 281,62 439833 263010
hdb 0,09 2,96 0,00 2767 0
hdb1 0,07 2,58 0,00 2407 0
HTH. Ciao, Dino.
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