Defining a graph template

Remember the Have a go hero challenge from Chapter 2, Using Graphs to Monitor Networks and Devices? The graph did show a yellow area reaching a defined threshold and a red one once the threshold was breached. Now you're going to define the same type of graph template for a Running Processes graph template.

CDEF definition

As a prerequisite, you're first going to create your two CDEFs, one for the green area and one for the yellow area. The threshold is set at 435 for the yellow and 470 for the red threshold, but you can change this to fit your needs. Let's have a look at the two CDEFs you're going to create shortly:

CDEF:isGreen=intspeed,0,434,LIMIT 
CDEF:isYellow=intspeed,435,470,LIMIT 

Cacti does not use named variables such as intspeed, but defines them according to the alphabet from a to z, so your definition from a Cacti view actually looks like:

CDEF:cdefa=a,0,434,LIMIT 
CDEF:cdefb=a,435,470,LIMIT 

isGreen and isYellow also have been changed. Don't worry, Cacti...