Autoscale with a fixed minimum. Or

Alain Tesio · Guest

Hi, I'd like to use the autoscale option for graphics but still keep the minimum at 0 (so an area twice bigger really means a value twice bigger)

raX · Posted: Fri Oct 18, 2002 9:41 am Post subject:

Yeah, I think that would be really cool too. I can think of a few situtions where it would make graphs looks nicer. Do you know if rrdtool can do this though? If it can, it should not be a problem for cacti to support it.

-Ian

Alain Tesio · Joined: 19 Oct 2002 Posts: 7 Location: Paris, France

Hi, it's supported by rrdtool, the option --alt-autoscale-max only autoscales the maximum value, so you should set the configured lower limit, see the patch below.

Another problem in rrdtool is that the man page says that the default lower limit is 0, but using alt-autoscale-max with no explicit lower limit autoscales the lower limit anyway.

Alain Tesio · Joined: 19 Oct 2002 Posts: 7 Location: Paris, France

Sorry it's the wrong column in the mysql query

bulek · Posted: Sun Oct 20, 2002 6:03 am Post subject:

I don't understand the disscusion I guess. Why don't you just use "--alt-autoscale-max" option in cacti Graph Configuration along with "Lower Limit" field? Seems to be simpler than patching the code.

- bulek

Alain Tesio · Joined: 19 Oct 2002 Posts: 7 Location: Paris, France

That's the problem, if I do what you write cacti doens't run rrdgraph with the lower-limit option, my patch fixes this.

bulek · Posted: Sun Oct 20, 2002 5:28 pm Post subject:

You are right, I've never noticed this. Good point!

Shouldn't your added line be the following (two changes in red)?

$scale .= "--lower-limit=" . mysql_result($sql_id, 0, "lowerlimit") . " \\\n";

- bulek

Alain Tesio · Joined: 19 Oct 2002 Posts: 7 Location: Paris, France

yes sure !

Guest · Posted: Fri Oct 25, 2002 3:45 am Post subject:

THX a lot for this patch

Now the option "--alt-autoscale-max" works fine.