System ground down to a halt

[Mark Haney]

I hoe you meant to say the Unix kernel required 32MB of RAM.  I know the
Xenix kernel required that much, back when I was learning Pascal and C on
it while at Va Tech in the early 90s.


On Fri, May 20, 2016 at 3:24 PM, Bret Busby <bret.busby at gmail.com> wrote:

> On 21/05/2016, Tom H <tomh0665 at gmail.com> wrote:
> > On Fri, May 20, 2016 at 6:51 PM, Paul Smith <paul at mad-scientist.net>
> wrote:
> >> On Thu, 2016-05-19 at 16:56 -0700, MR ZenWiz wrote:
> >>>
> >>> I have 16GB of RAM with almost 13GB of swap space (holdover from when
> >>> I only had 8GB - never updated). I'm running on an i7 (effectively 8
> >>> CPUs).
> >>
> >> The old adage of "swap = 0.5x RAM" makes no sense for systems with >4G
> >> RAM, which many systems have nowadays.
> >>
> >> Personally I would never add more than 2G swap to any of my systems,
> >> regardless of how much RAM they have. 13G swap is _really_ asking for
> >> trouble.
> >
> > Didn't the old adage predate s2ram (for which you need SWAP=RAM)?
> >
>
> My memory, from the time of Win95, etc, was that the swap space should
> be twice the size of the RAM, and, when I first learnt UNIX, we were
> told by the lecturer, that the UNIX kernel required 32GB of RAM, which
> was why paging occurred. That was about 20-30 years ago, when BSD was
> 4.3, and SCO UNIX was System V v7, or something like that.
>
>
> --
>
> Bret Busby
> Armadale
> West Australia
>
> ..............
>
> "So once you do know what the question actually is,
>  you'll know what the answer means."
> - Deep Thought,
>  Chapter 28 of Book 1 of
>  "The Hitchhiker's Guide to the Galaxy:
>  A Trilogy In Four Parts",
>  written by Douglas Adams,
>  published by Pan Books, 1992
>
> ....................................................
>
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