Subject: How to add swap file -- Re: Network slowness
To: None <port-pmax@NetBSD.ORG>
From: Toru Nishimura <email@example.com>
Date: 01/13/1998 09:54:47
>> Sounds very odd. I've been using NetBSD/pmax with my MAXINE since
>> 1996 Summer and never experienced such a trouble. Are you definitely
>> sure about your network configuration? How about other machines in
>> the same wire?
> Does the X server work reliably on it? The whole system acts quite odd
> whenever X is running.
> [ ... your problem persists ... ]
> BTW, I haven't used a BSD machine in a while... How do you know how much
> swap space you gave yourself? Is there a good way to temporarily add more
> without adding another drive? I can't seem to get a perl compile through
> even a make depend without bsd reseting with a 'panic: vm_fork: no more
> kernel virtual memory' !!! I've got 24mb physical and however much swap
> sysinst set for me on a "standard /usr with X" install. Is there no way to
> add temp swap files on a non-dedicated partition?
How much did you reserve swap space? MIPS architecture requires much
RAM than loosy CISC decendent. NetBSD allows you to add swap space as
a large file by vnd(4) interface. You have to understand swapctl(8) to
add swap space as a file. Steps would be;
1. make a large tempolary file;
dd if=/dev/zero of=<YOUR_TEMP_SWAP> seek=10240 bs=1k count=8
This example reserves 10MB+ temporary space.
2. add it as an addtional swap;
/sbin/swapctl -a -p 5 <YOUR_TEMP_SWAP>
3. check to see it's done well;
/sbin/swapctl -l -k
This should produce lines like;
Device 1K-blocks Used Avail Capacity Priority
/dev/rz0b 37296 4 37292 0% 0
/dev/?? 10248 0 10248 0% 5
Total 47544 4 47540 0%
(I donno why /dev/?? is shown here)
FYI, my MAXINE has 40MB RAM and 36MB+ dedicated swap space and I
routinely use it for NetBSD kernel build with 4 parallel make (make -j 4).
It seldom uses swap space, and runs as CPU/RAM speed.
Hope this info help you.
Nara Institute of Science and Technology