| Value | Meaning |
|---|---|
| OVERFLOW0 | The QoS event type that is produced when upstream elements are producing data too quickly and the element can't keep up processing the data. Upstream should reduce their production rate. This type is also used when buffers arrive early or in time. |
| UNDERFLOW1 | The QoS event type that is produced when upstream elements are producing data too slowly and need to speed up their production rate. |
| THROTTLE2 | The QoS event type that is produced when the application enabled throttling to limit the data rate. |
The different types of QoS events that can be given to the Event.newQos method.