Set Operator
The Set Operator can take in 2->N inputs and will perform a set operation on the inputs. At this point only UNION ALL is supported by the set operator. It is a stateful operator and has one B+ tree for each input.
Metrics
The Set Operator has the following metrics:
| Metric Name | Type | Description |
|---|---|---|
| busy | Gauge | Value 0-1 on how busy the operator is. |
| backpressure | Gauge | Value 0-1 on how much backpressure the operator has. |
| health | Gauge | Value 0 or 1, if the operator is healthy or not. |
| events | Counter | How many events that pass through the operator. |
info
At this point, a set operator will never be unhealthy. If there is a failure against the state, the stream will instead restart.