jay@hqda-ai.ARPA (Jay Hiser) (07/29/88)
I'm responsible for 3 (soon to be 6) Tahoes, CCI's own Power 6/32 running CCI's SysVR2.22 and OFFICE POWER software. Presently they have 8 megs & 1 processor. Plans are to increase memory to 16M. All systems have 1 controller & two drives. One test machine (lucky one!) will have an additional drive & controller. I'm interested in some guidelines on what numbers I should be looking at when using the sar utility. Inode tables look good. Hit ratio on reads is 95%+, but on writes it hovers below 80%. sar -u often shows %wio over 20%. I suspect that increasing the size of my disk caches will improve performance (although performance is already more than acceptable). I'd appreciate comments & any official guidelines. Thank you, Jay Heiser ..uunet!daitc!otishq!TONS61!jayh
muller@sdcc7.ucsd.EDU (Keith Muller) (07/30/88)
One other thing you might try is the 4.3BSD-tahoe release. MUSH benchmarks on system V and 4.3BSD-tahoe is quite favorable towards 4.3bsd-tahoe by a significant amount. Clearly some of this is due to a much better compiler on 4.3BSD (thanks Donn Seeley!), but general kernel overhead is a lot less also. tcp/ip on 4.3BSD-tahoe has van jacobsons performance mods. Keith Muller University of California