After it finishes the 1st Optimzation task, what's the next job which will be pulled ?

The one in the highest queue (if you have multiple queues)
If you use fairness it will pull in round robin from all queues, (obviously inside every queue it is based on the order of jobs).
fyi, you can reorder the jobs inside the queue from the UI 🙂
DeliciousBluewhale87 wdyt?