What advantage is extra memory?
Jon H. LaBadie
jon at jonlab.UUCP
Sat Dec 15 17:57:16 AEST 1990
I'm running a UnixPc with 2 Mbyte of memory (67 Mbyte drive).
I've also got the DOS-73 card and the 23 Mbyte tape drive.
The O.S. is stock 3.51, no FixDisk upgrades.
I just acquired a combo card with 1.5 Mbyte additional memory.
Three questions related to performance:
1. What if any performance inprovements should I expect by having
the 75% greater total memory?
2. I figured that I/O might benefit by having more disk buffers etc.
so I used ktune to increase nbuf (100 -> 200), clist, and one
other parameter. To my surprise, 6 tunable parameters were
affected by my ktune command. The 3 increases I requested were
partially implemented (ex. nbuf went to 150 rather than 200 as
requested) but 3 other parameters were decreased (ex. nproc and
nfile).
Any comments on what is going on here? And what are good choices
for the tunable parameters with 3.5 vs. 2.0 Mbytes memory?
3. I'm using an external 2400 baud modem (thanks Pete). Any reason
to consider switching to the combo card tty ports rather than the
builtin tty port for this device?
Thanks for sharing your collective experience.
Jon
--
Jon LaBadie
{att, princeton, bcr, attmail!auxnj}!jonlab!jon
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