OperatorIOMetricGroup (Flink : Metrics : Core 2.1.2-cp1 API)

All Superinterfaces:

MetricGroup
```
@PublicEvolving
public interface OperatorIOMetricGroup
extends MetricGroup
```
Metric group that contains shareable pre-defined IO-related metrics for operators.
You should only update the metrics in the main operator thread.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Counter`	`getNumBytesInCounter()`	The total number of input bytes since the task started.
`Counter`	`getNumBytesOutCounter()`	The total number of output bytes since the task started.
`Counter`	`getNumRecordsInCounter()`	The total number of input records since the operator started.
`Counter`	`getNumRecordsOutCounter()`	The total number of output records since the operator started.

Methods inherited from interface org.apache.flink.metrics.MetricGroup
addEvent, addGroup, addGroup, addGroup, addSpan, counter, counter, counter, counter, gauge, gauge, getAllVariables, getMetricIdentifier, getMetricIdentifier, getScopeComponents, histogram, histogram, meter, meter

- Method Detail
  - getNumRecordsInCounter
```
Counter getNumRecordsInCounter()
```
    The total number of input records since the operator started. Will also populate numRecordsInPerSecond meter.
  - getNumRecordsOutCounter
```
Counter getNumRecordsOutCounter()
```
    The total number of output records since the operator started. Will also populate numRecordsOutPerSecond meter.
  - getNumBytesInCounter
```
Counter getNumBytesInCounter()
```
    The total number of input bytes since the task started. Will also populate numBytesInPerSecond meter.
  - getNumBytesOutCounter
```
Counter getNumBytesOutCounter()
```
    The total number of output bytes since the task started. Will also populate numBytesOutPerSecond meter.