[rrd-users] RRDTool Aggregation Inaccuracies.

NHarris nicholas.kyle at gmail.com
Thu Jul 9 02:28:29 CEST 2009

It looks like this is related to the resolution interval of the graph

Of course the graphs put out the right peak for 24hour graphs - there are
only 288 data points to contend with, which easily fits into the 400px

The problem starts when I have more data points than pixels. RRDGraph seems
to be doing some consolidation on those data points to make them fit (makes

My (new) question is this: if these RRAs are set up to use MAXIMUM and I am
calling VDEFs with MAXIMUM, why are the graphs returning different numbers?
Shouldn't the longer time frames simply have consolidated the data by taking
the max data points and tossing the rest?

More importantly, why is RRDGraph returning values that are *higher* than
the actual max that RRDFetch returns?

Hope someone can help - I'm really starting to get confused.

View this message in context: http://n2.nabble.com/RRDTool-Aggregation-Inaccuracies.-tp3217529p3228853.html
Sent from the RRDtool Users Mailinglist mailing list archive at Nabble.com.

More information about the rrd-users mailing list