Capacity planning for tagging looks easy in spreadsheets and harder in November when traffic spikes by ten times overnight.

The short version: a container that survives Black Friday without paging anyone is mostly a matter of doing the obvious thing carefully. Look at last year's peak, add a margin, and validate with a dry-run load test. Most overspend comes from being conservative without measuring.

You will run slightly hot during normal weeks to be safe during peak weeks. The trade is usually worth it. That trade-off is the one most teams underweight when they plan the work, and it is the one that quietly determines whether the project ships on time.

If you want a longer treatment, we have a deeper post in the series. For now, the takeaway is small enough to fit on a sticky note: Capacity planning is one of those projects that nobody notices when it goes well, which is the entire point.