On Mon, 22 Oct 2001, Steven Cayford wrote:
> On 2001.10.21 22:29:05 -0500 Jeff Newmiller wrote:
>
> [snipped]
>
> > 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.
> >
> Hmm. Okay. df -k tells me this:
>
> Filesystem 1k-blocks Used Available Use% Mounted on
> /dev/ram0 16208 4456 11752 27% /
> /dev/ram1 2022 47 1975 2% /var/log
>
> and free tells me this:
>
> total: used: free: shared: buffers: cached:
> Mem: 15007744 14741504 266240 6922240 6479872 2195456
> Swap: 0 0 0
> MemTotal: 14656 kB
> MemFree: 260 kB
> MemShared: 6760 kB
> Buffers: 6328 kB
> Cached: 2144 kB
> SwapTotal: 0 kB
> SwapFree: 0 kB
>
> I guess I could cut ram0 down by half and still have plenty of room. Is
> that reasonable?
Yes. I am quite happy with a 6M ramdisk.
The main danger with a too-small main ramdisk is filling it up with a fat
root.lrp during backup.
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