[rrd-users] Re: MAX doesn't work as expected: peaks are filtered
Alex van den Bogaerdt
alex at ergens.op.het.net
Mon Aug 16 09:57:47 MEST 2004
On Sun, Aug 15, 2004 at 03:43:08PM +0200, Cristian Ghezzi wrote:
> It appears that all values inserted in the database within the last STEP
> period are always averaged when creating a PDP, even when I'm going to
> use the value in a MAX RRA, thus creating spurious values.
> This means that if I insert more than one value within a step, I will
> not find the MAX of those values in the database, but an average value
> which will always be lower than expected.
So, you are going to have "--step 1" and all is well. Adjust your RRA
steps per CDP to your liking.
> - What happens is clearly wrong: the value of 500 inserted in the middle
> of the previous STEP, which is an absolute maximum for the whole period,
> has been smoothed down to 450.
This is not wrong. This is expected behaviour. You can control this
process by adjusting step sizes and steps.
> Am I doing something wrong?
"rrdtool is wrong, rrdtool is bad, rrdtool sucks, Am I doing something wrong?"
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