Modifying default number of buffers
Dinah Anderson
dinah at shell.UUCP
Mon Jan 16 07:19:07 AEST 1989
>I would like to be able to modify the number of buffers selected by the
>kernel. It appears to do this based on the amount of memory available. I
>couldn't find anything in any of the system's .h files to allow tuning of
>this. Is there some way to do this without source?
I am assuming you are talking about disk buffers (NBUFS). I can tell you
how to do that.
On your running system: (This examples changes the value to 700.) We were
running 3.2 on a Sun 4.
adb -w /vmunix
nbuf?W 2bc (which is 700 decimal)
Now re-boot.
Checked with:
adb -k /vmunix /dev/mem
nbuf?D (shows in decimal what this is in /vmunix)
nbuf/D (shows in decimal what this is in /dev/mem)
(Note: This value also shows up when you boot.)
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