count
Trips when the total number of events in a window exceeds a threshold.
How it works
Measures absolute volume. It counts discrete events regardless of value to monitor system throughput or load.
When to use
- Volume-based rate limiting or DDoS protection.
- Detecting sudden traffic surges.
- Protecting system resources from absolute query volume.
When not to use
- When quality or specific values (latency/error) are the primary concern.
- When traffic naturally fluctuates and a normalized ratio is preferred.
State explanations
closed
System volume is within handled capacity.
half open
Waiting for a sustained decrease in system volume.
open
Event volume suggests potential resource exhaustion.