RE: Debian's recommendation for the size of the swap.
Hey all,
I have to admit to ignorance on this subject, never spent much time
worrying about swap file and VM. Never much interested me.
But, for reading this discussion I have a question. I have 12M of Ram
and 12M of Swap (could afford more only have 250M). Now if I have a
program that requires 20M of Ram to run, then With my specs it should
run? I'm I right on this one....?
Rod.....
> ----------
> From: renehl@post1.tele.dk[SMTP:renehl@post1.tele.dk]
> Sent: Thursday, October 15, 1998 1:51 AM
> To: debian-user@lists.debian.org
> Subject: Re: Debian's recommendation for the size of the swap.
>
> zhaoway@njlug.org wrote:
> > On Wed, Oct 14, 1998 at 11:34:16PM +0300, shaul wrote:
> >> (1) Linux accept up to 128MB for a single swap partition (2) There
> is
> >> (was) a rule of thumb to have a swap size as twice as the RAM the
> >> machine has (3) Having more RAM reduces the needs for swap.
> >
> > ya konw, i'm a little confused. people say more RAM reduce the needs
> for
> > swap while swap is recommended for double size of RAM ? yeah, newbia
> i
> > am :-P
>
> That swap must be >= 2*RAM is a common misconception in the Linux
> world.
> On BSD's this is a good rule of thumb, due to a different VM[1]
> subsystem
> design but on Linux only the RAM+swap figure matters.
>
> The only general rule for swap size is that you should have enough.
> That
> means that RAM+swap should be large enough to run the programs you are
> likely to run at any given time.
>
> Note, however, that you should always have *some* swap, even if all
> your
> programs will fit in RAM, to allow the kernel to swap out unused pages
> and
> make room for more buffers. Similarly, you should always have some
> unused
> VM to allow for extraordinary memory requirements and to make room for
> buffers. Did I mention that buffers are a good thing? :-)
>
> It is, of course, better to have too much swap space than too little.
> Horrible things will happen if you run out of VM: processes will be
> randomly killed off, the system may crash, etc.
>
> > i'm currently use 12M swap with 64M RAM, is it too few ? i feel ugly
> > when open *guash*, and xemacs and netscape opened very slowly. i
> only
> > have 2G hd, and 750M among it is spared for win98 'cause i need its
> > support for chinese stuff.
>
> I would probably add some some swap space, but as I outlined above,
> this
> is a very individual thing. My box has 64MB RAM + 96MB swap and it
> seems
> quite happy with that configuration. However, I probably use more VM
> than
> most people...
>
> [1] VM = Virtual Memory
> --
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> Don't ya just hate it when there's not enough room to fin
>
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