Hello everyone,
My boss pointed this out to me and it does seem weird. I understand the Averages changed based on the time frame you are looking but why does the Max value change when looking at different time frame.
Here is a answer. We have many stores that are 56k frame relay, I am watching the interface on this side of the PRI. As you can see from the "Strange.jpg", the max value isn't constant across the graphs?
I have also found that if you change the graphs to "Last Month" or "Last Week" the graphs will change on thier Max values. But once you zoom in on the highest point, you get a true value.
Has anyone seen this? Why does this happen? It is a bug? I am on Cacti 0.8.6c with no patches installed, using Cactid 0.8.6d. Thanks for your help in advance.
-Todd
toddtowles@brookshires.com
Bandwidth Max Question
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Bandwidth Max Question
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- Max Values change...
- Strange.jpg (150.48 KiB) Viewed 1345 times
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- Last Month of Store 606 - note the max value
- LastMonth-606.jpg (46.61 KiB) Viewed 1345 times
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- Here is the zoom of the "Last Month" for Store 606 - and this shows the true max value
- LastMonth-zoom-606.jpg (41.2 KiB) Viewed 1345 times
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rony
- Developer/Forum Admin
- Posts: 6022
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Not a bug.... 
It's the way that RRDtool is averaging the graphs. Basically, the max is the maximum value that you see on that graph, that you have already seen. So, on the Yearly (2 Hour) graph, you are seeing a max over that range of 9k over 2 hours.
Check out the RRDtool documentation at www.rrdtool.org.
It's the way that RRDtool is averaging the graphs. Basically, the max is the maximum value that you see on that graph, that you have already seen. So, on the Yearly (2 Hour) graph, you are seeing a max over that range of 9k over 2 hours.
Check out the RRDtool documentation at www.rrdtool.org.
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Bandwidth Average
Yeah, I didn't think it was a bug, but you know PHBs. After looking closer, I see that during a Year graph, it will average each day into one set of numbers (max and average) and then those average daily maxs will be averaged into a average yearly max. =)
Geezz..lol Thanks for the help
Geezz..lol Thanks for the help
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