On Sun, 21 Oct 2001, Steven Cayford wrote:
> Thanks to folks for your suggestions. I've got my leaf box up and running
> with dnscache, tinydns, dhclient, dhcpd and more. Cool. What an excellent
> system.
>
> One question: I'm curious how the ram disks work. When I do df -k, the
> total size would seem to be larger than the amount of memory on the machine
> leaving nothing for actual useable ram. That can't be right. How is ram
> disk space allocated? Any faq's on this somewhere?
This doesn't sound very good to me.
The ramdisk driver only takes the memory it actually needs, up to the
maximum ramdisk size. df reports the maximum space that volume could
require. If the sum of your maximum values is greater than your actual
ram, then your system could lock up if you have a DOS event (for
example) that fills your logs and therefore actually attempts to use
the maximum memory. You could still be okay, though, since the
other ramdisk(s) won't be changing their memory usage.
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