No, this assumes you've already split your tasks into quanta of approximately the same duration - so all tasks are weighted equally in terms of execution time. If each of the tasks have different weights you might be looking at something like deficit round-robin [1], which I've looked at implementations for in RabbitMQ and we're thinking about how to implement in PG as well [2].

[1] https://www.cs.bu.edu/fac/matta/Teaching/cs655-papers/DRR.pd...

[2] https://nithril.github.io/amqp/2015/07/05/fair-consuming-wit...