vmstat versus sar (scan rate)

[mdet]

I would like to know the units in which "sar" and "vmstat" respectively display the scan rate (column "sr" in vmstat's output). In infodoc# 14136 on the SunSolve Online site it's pointed out that vmstat's "sr" column shouldn't be above 200 for a while.
While "sar" shows up the scan rate in "pages per second" on the other hand "vmstat" does it's measurement depending on the last two given integer parameters which give the interval (in seconds) and the number of measurements to be taken respectively.
So if you enter vmstat 1 10 (nine measurements with 1 second interval) you can directly compare the "sr" column with the "scan rate" values of sar. If you enter "vmstat 2 10" you would take one half of the shown value. Right?
Well, then I cannot follow the above let's say "200 rule". Just imagine entering "vmstat 1000 2".

Anybody out there who can make this clear to me?

 

[cfsalmeida]

"Adrian Cockcroft" Sun performance guru, says about "vmstat sr":
page -sr, scan rate.
High continuous activity indicates you are short of memory
(ie., over 200 pages/second averaged over 30 seconds).

Regards,

Carlos Almeida

 

[mdet]

Carlos,
obviously my question is not clear enough. In short form:
Does vmstat's output in column [tt]sr[/tt] show up the scan rate in units of pages per second (as [tt]sar -g[/tt] does) or is it the cumulative value depending on the parameters [tt]interval[/tt] and [tt]count[/tt]?

Michael.