sns@tybalt.caltech.edu (Samuel N. Southard) (04/27/87)
I have lots (7 Meg) of memory and would like to reconfigure my kernel to take advantage of it - the default kernel only has 100K of buffer space. I am sure that, if I had a properley configured kernel I would see a fairly large speed increase. The system I'm on is an AT running IBM Xenix 2.00 (Sys V). I tried to use the config command, but I must be real confused about it, because it spewed at me when I fed it what seemed to be a perfectly reasonable config file. Has anyone done this before and would you be willing to assist? While I'm at it, does anyone have any suggestions as to what numbers I should use for the various tunable parameters to get the most out of my machine? My cat can quack, can yours? genghis!sns@csvax.Caltech.Edu
caf@omen.UUCP (04/28/87)
In article <2486@cit-vax.Caltech.Edu> sns@tybalt.caltech.edu (Samuel N. Southard) writes:
:I have lots (7 Meg) of memory and would like to reconfigure my kernel to take
:advantage of it - the default kernel only has 100K of buffer space. I am sure
:that, if I had a properley configured kernel I would see a fairly large speed
:increase.
:
The procedure for increasing the buffer allocation in SCO Xenix is to edit the
"master" file in /usr/sys/conf (or therebaouts) and remake the kernel (mostly
relinking).
With the SYS V 2.1x kernels, one could get up to 200 buffers, I don't know
what the limit is for 2.2. I've experimented with values up to 500k.
Large values cause the system to lurch when a sync(1) call flushes them out
periodically. A more intelligent solution is needed here, such as writing
all dirty buffers that have been dirty for 30 seconds, and doing this every
few seconds so there aren't too many to do all at once.miket@ncoast.UUCP (05/01/87)
In article <2486@cit-vax.Caltech.Edu> sns@tybalt.caltech.edu (Samuel N. Southard) writes: >I have lots (7 Meg) of memory and would like to reconfigure my kernel to take >advantage of it - the default kernel only has 100K of buffer space. I am sure >that, if I had a properley configured kernel I would see a fairly large speed >increase. > >The system I'm on is an AT running IBM Xenix 2.00 (Sys V). I tried to use the >config command, but I must be real confused about it, because it spewed at me >when I fed it what seemed to be a perfectly reasonable config file. > >Has anyone done this before and would you be willing to assist? While I'm at >it, does anyone have any suggestions as to what numbers I should use for the >various tunable parameters to get the most out of my machine? > >My cat can quack, can yours? genghis!sns@csvax.Caltech.Edu Get SCO V.2.2, they've *finally* put the buffers in a far data structure. I honestly don't know what version of SCO IBM Xenix is. On my old sco system I had about 195 bugffers (no word wrap, grr) I had about 195 buffers. under SCO 2.2 I'm pushing 300+ Buffers are wunderfull. I believe, that the SCO will go as high as you like, ...... Try this command: configure. If that doesn't work, you've obviously boaught the wrong Xenix.... Mike Taht (Brain purchased in Bargin Bin. No warrantee)