ByteBufAllocatorMetric (Netty API Reference (4.2.1.Final))

All Known Implementing Classes:

AdaptiveByteBufAllocator, PooledByteBufAllocatorMetric
```
public interface ByteBufAllocatorMetric
```

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`long`	`usedDirectMemory()`	Returns the number of bytes of direct memory used by a `ByteBufAllocator` or `-1` if unknown.
`long`	`usedHeapMemory()`	Returns the number of bytes of heap memory used by a `ByteBufAllocator` or `-1` if unknown.

- Method Detail
  - usedHeapMemory
```
long usedHeapMemory()
```
    Returns the number of bytes of heap memory used by a ByteBufAllocator or -1 if unknown.
  - usedDirectMemory
```
long usedDirectMemory()
```
    Returns the number of bytes of direct memory used by a ByteBufAllocator or -1 if unknown.