I have an almost identical configuration...TWGS on a K6-III 450 and a 1.5M/384K connection. However, my BBS and internet services run on a Linux/Thunderbird rocket.
Basically, your upstream bandwidth of 384K bits is the limiting factor. You've got a bandwidth of about 48K bytes to work with. I've found that 10 busy users will draw about 12-15K bytes. You can probably support 20 concurrent users without any lag. I'm running 32 nodes, but have never hit the limit. The most I see on my system is around 25 drawing about 30K bytes. Haven't had any significant complaints about lag and when I've spyed on users to see how its running with that load, it seems perky enough. Also under that load, my system monitor reports an average of about 30% CPU utilization and about 40% memory utilization (out of 256M).
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Edited by - craig on March 13 2002 02:01:12 AM