On Wed, Jul 02, 2003 at 10:33:04AM -0400, James Amann wrote:

> I am trying to confirm that the MAX values are never averaged.  Meaning if I 
> recive a value that is the max for a 5 min period, when aggregated into the 
> 1/2 hr period, if it is still the max value of the other 5 min slices for the 
> 1/2 hour, it will still be the max, and so on.
> 
> I have looked through the docs and cannot confirm from what I found, and I 
> have always assumed that the maximum value would propogate to the last 
> aggregation at 1 day without any averaging, but we are seeing something in 
> our logs that forces me to ask the question.

Perhaps you should share this "something" with us...

The way MRTG should work:

5-minute average #1 \
5-minute average #2  \
5-minute average #3   \ 30-minute average = (#1+#2+#3+#4+#5+#6)/6
5-minute average #4   / 30-minute maximum = max(#1,#2,#3,#4,#5,#6)
5-minute average #5  /
5-minute average #6 /
5-minute average #1 \
5-minute average #2  \
5-minute average #3   \ 30-minute average = (#1+#2+#3+#4+#5+#6)/6
5-minute average #4   / 30-minute maximum = max(#1,#2,#3,#4,#5,#6)
5-minute average #5  /
5-minute average #6 /

and so on;  dito for 30-minutes --> 2 hour and so on.

-- 
Much of what looks like rudeness in hacker circles is not intended to give
offence. Rather, it's the product of the direct, cut-through-the-bullshit
communications style that is natural to people who are more concerned about
solving problems than making others feel warm and fuzzy.

http://www.tuxedo.org/~esr/faqs/smart-questions.html

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