One Quickie

Increasing shared memory limits (Unix->Administration)
Edit /System/Library/StartupItems/SystemTuning/SystemTuning

tweak some values, like

sysctl -w kern.sysv.shmmax=167772160 # bytes: 160 megs
sysctl -w kern.sysv.shmmin=1
sysctl -w kern.sysv.shmmni=32
sysctl -w kern.sysv.shmseg=8
sysctl -w kern.sysv.shmall=65536 # 4k pages: 256 megs
Save, and restart your system.

On some Panther seeds, you may need to add these things to /etc/rc

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