[1.3] Graph debug displays incorrect information

[xmacan]

I found this out when my rrdtool was crashing on a segmentation fault. The graphs were not displayed, but debugging said: ok. In debug we have the command "rrdtool graph ...", but in 1.3 we use rrdtool graphv, so debug shows something else.

But it's not possible to just switch to graphv, because we don't get a simple response from rrdtool. Graphv returns a lot of additional data.

It would also be good for debug to display a smaller time span than 24 hours. If the graph starts to work, after a couple of poller cycles, it might show only 1 millimeter of data in the graph and the rest is empty. It is not very clear. I would probably set only the last hour.

[TheWitness]

HRM, maybe 4 hours by default?

[TheWitness]

Do you have any example output @xmacan ?

[xmacan]

I just got back from vacation, I'll be back to the cacti in a few days