# `ClusterStatsClusterJvmMemory` [interface-ClusterStatsClusterJvmMemory]

| Name | Type | Description |
| - | - | - |
| `heap_max_in_bytes` | [long](./long.md) | Maximum amount of memory, in bytes, available for use by the heap across all selected nodes. |
| `heap_used_in_bytes` | [long](./long.md) | Memory, in bytes, currently in use by the heap across all selected nodes. |