What polling costs

Worked examples, recomputed

Every number the mechanisms quote for this relationship is recomputed from it, so none of them disagrees with it.

• a one-minute poll over a four-hour wait → 240 LIST calls
• 300 sensors → 72,000 LIST calls a night

Where it appears

Each mechanism states it in its own names. The general symbol each name stands for is shown with it.

• Orchestration & Workflow

  How do you make unreliable, unobservable, irreversible side effects behave like a pure function of a time interval?

  $$(\text{waiting time}÷\text{poll interval})\times \text{cost per poll}$$

  Read it in place →