Some graphs capped at 100

[DataScrub]

I'm using 0.8.6b on Linux, and have been using various versions of Cacti for over a year. It's truly an amazing product, especially for those of us who relied on MRTG for all those years.

I have a number of graphs that I generate based on values output by scripts, mostly involving database routines. My problem is that many (but certainly not all) of these graphs seem to be capped at 100, as though they are showing percentiles instead of absolute values. I have looked at the configuration over and over, and cannot find any differences between the ones that work and the ones that don't. All datasources have "minimum" and "maximum" value set to 0, and Data Source Type is always Gauge. All graphs are set to "Auto Scale", so the Upper Limit should be ignored. (In fact, some of the graphs graph two values, one of which appears capped at 100, while the other has no such cap, so I would assume this is a Data Source issue.)

Is there some other setting that I'm missing that would discard/ignore data over 100? I have verified that the scripts in question are outputting the desired values.

Thanks for your help.

[BSOD2600]

run rrdtool info on the various rra files in question. I bet some of the min/max/guage types will be different. Currently, cacti does not update the rra values when it is changed in the cacti interface.

[DataScrub]

That's exactly it.

So, short of blowing away all my existing data and starting over, is there an rrdtool command to modify those parameters while live? (I know, it's probably an RTFM...)

[DataScrub]

Never mind, found "rrdtool tune"...