Calculations run on this device. Scenario values are not sent anywhere — the engine is fully local.
system design calculator · free
Connection Pool Sizer
Little's Law meets max_connections: size pools that neither queue nor crush the DB.
How big should the pool be — and what breaks when it's bigger?
Engine 1.0.0 · calculation
1500
ms
55000
15000
ms
105000
- Throughput cap
- 1250 /s
- Utilization
- 64.0%
- Acquire risk
- medium
- Timeout
- 200 ms
Pool covers arrival rate under this hold time.
pool 50 × 25.0 turns/s
Method
- Deterministic local model of the mechanism — knobs recompute outputs instantly with no network.
- Numbers are teaching approximations, not production capacity guarantees.