Re: Pre-allocation of shared memory ...

I will say I do use swap sometimes when I am editing a huge image or
something --- there are peak times when it is required.

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Nigel J. Andrews wrote:
> On Fri, 13 Jun 2003, Lamar Owen wrote:
>
> > On Friday 13 June 2003 11:55, Josh Berkus wrote:
> > > Regrettably, few of the GUI installers for Linux (SuSE or Red Hat, for
> > > example), include adequate swap space in their "suggested" disk formatting.
> > > Some versions of some distributions do not create a swap partition at all;
> > > others allocate only 130mb to this partition regardless of actual RAM.
> >
> > Incidentally, Red Hat as of about 7.0 began insisting on swap space at least
> > as large as twice RAM size. In my case on my 512MB RAM notebook, that meant
> > it wanted 1GB swap. If you upgrade your RAM you could get into trouble. In
> > that case, you create a swap file on one of your other partitions that the
> > kernel can use.
>
> I'm not sure I agree with this. To a large extent these days of cheap memory
> swap space is there to give you time to notice the excessive use of it and
> repair the system, since you'd normally be running everything in RAM.
>
> Using the old measure of twice physical memory for swap is excessive on a
> decent system imo. I certainly would not allocate 1GB of swap! Well, okay, I
> might if I've got a 16GB machine with the potential for an excessive
> but transitory workload, or say 4-8GB machine with a few very large memory
> usage processes that can be started as part of the normal work load.
>
> In short, imo these days swap is there to prevent valid processes dying for
> lack of system memory and not to provide normal workspace for them.
>
> Having said all that, I haven't read the start of this thread so I've probably
> missed the reason for the complaint about lack of swap space, like a problem on
> a small memory system.
>
>
> --
> Nigel J. Andrews
>
>
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>

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