[ale] top and SWAP

[Warren Myers]

the man page for top says that the 'swap' field indicates "the swapped out
portion of a task's total virtual memory image"

WMM

On 9/7/07, Jeff Hubbs <hbbs at comcast.net> wrote:
>
> Xosview appears to have a "page" bar with separate colors for in and out.
>
>
> John Wells wrote:
> > ----- "Jeff Hubbs" <hbbs at comcast.net> wrote:
> >
> >> Don't mischaracterize this as "heavy swapping."  Heavy swapping of the
> >> sort you want to avoid refers to *swap I/O*; that's distinct from the
> >> OS "parking" sections of RAM that it thinks it won't often need into
> your
> >> swap partition(s), regardless of how big they are.
> >>
> >
> > Understood. So, given that, swap I/O would be a metric I suppose one
> would want to watch, and not necessarily swap usage, because as you say, if
> it's written to disk and never read back in, it wouldn't be a tax on
> performance.
> >
> > So how does one measure/monitor swap i/o?
> >
> > Thanks,
> > John
> >
> >
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> >
> >
>
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