# `FielddataStats` [interface-FielddataStats]

| Name | Type | Description |
| - | - | - |
| `evictions` | [long](./long.md) |   |
| `fields` | Record<[Field](./Field.md), [FieldMemoryUsage](./FieldMemoryUsage.md)> | &nbsp; |
| `memory_size_in_bytes` | [long](./long.md) | &nbsp; |
| `memory_size` | [ByteSize](./ByteSize.md) | &nbsp; |