Printer classes

[Michael De Vlaminck]

Hello,

When using printer classes, a job sent to a class is sent to the first available printer in that class. But how does cups decide what printer is the first available?
For example when you have a printer A with 4 jobs on queue and another printer B with only 2 job on queue. The first available printer can be B because it has only 2 jobs. But those 2 jobs can be very large so that printer A (with 4 small jobs) will be the first available.
How exactly is it decided which is the first availble printer?

thanks
Michael De Vlaminck