Requests per second.

the two-minute refresher

• RPS = daily actions ÷ 86,400 seconds; ÷ 100,000 is a handy shortcut.
• Example: 550 million actions a day ≈ 6,400 RPS on average.
• Peak traffic is a multiple of the average; servers and databases must survive the peak.
• Split reads from writes: read-heavy and write-heavy systems need different designs.