[ale] top and SWAP

[jb at sourceillustrated.com (John Wells)]

----- "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