Matthew Dillon scribbled this message on Jul 13:
> FreeBSD's swap subsystem has a basic limitation of 4 swap areas. This
> is due to the design of the interleaving algorithms. Increasing this
> number is simple, but it results in phenominally more kernel memory
> getting wired. Within this limitation we can theoretically add and
> remove swap areas with relative easy. It would be somewhat easier to do
> under CURRENT because the swap metadata structures are simpler.
hmmm... so this means that on my home server where I have:
Device 1K-blocks Used Avail Capacity Type
/dev/od0b 262144 31176 230840 12% Interleaved
/dev/da1b 393216 31136 361952 8% Interleaved
/dev/da2b 262144 31072 230944 12% Interleaved
/dev/da3b 131072 31180 99764 24% Interleaved
/dev/sd4b 393216 30916 362172 8% Interleaved
/dev/sd5b 65536 30992 34416 47% Interleaved
/dev/sd6b 131072 30580 100364 23% Interleaved
Total 1637504 217052 1420452 13%
FreeBSD metriclient-2.uoregon.edu 3.0-RELEASE FreeBSD 3.0-RELEASE #19: Sun May 16
18:36:07 PDT 1999 root@:/a/home/johng/FreeBSD-checkout/30r/sys/compile/hydrogen
i386
does this mean that the kernel is using more wired memory than it should
be? I have been able to do extensive swapping and when I do, I can get
around 3-4meg/sec for EACH of swapping in and out... so the performance
is pretty decient... and I have 80megs of ram in the machine...
I have:
options "NSWAPDEV=10"
in my kernel config file...
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