# VM Memory Collector Collects information about memory dynamically allocated by the Erlang emulator using [:erlang.memory/0](http://erlang.org/doc/man/erlang.html#memory-0). Also provides basic (D)ETS statistics. ## Exported metrics

```
erlang_vm_memory_atom_bytes
```
Type: gauge.
Labels:
- usage="free"|"used".
The total amount of memory currently allocated for atoms. This memory is part of the memory presented as system memory.
```
erlang_vm_memory_bytes
```
Type: gauge.
Labels:
- kind="system"|"processes".
The total amount of memory currently allocated. This is the same as the sum of the memory size for processes and system.
```
erlang_vm_dets_tables
```
Type: gauge.
Erlang VM DETS Tables count.
```
erlang_vm_ets_tables
```
Type: gauge.
Erlang VM ETS Tables count.
```
erlang_vm_memory_processes_bytes
```
Type: gauge.
Labels:
- usage="used"|"free".
The total amount of memory currently allocated for the Erlang processes.
```
erlang_vm_memory_system_bytes
```
Type: gauge.
Labels:
- usage="atom"|"binary"|"code"|"ets"|"other".
The total amount of memory currently allocated for the emulator that is not directly related to any Erlang process. Memory presented as processes is not included in this memory.

## Configuration Metrics exported by this collector can be configured via `:vm_memory_collector_metrics` key of `:prometheus` app environment. Available options: - `:atom_bytes_total` for `erlang_vm_memory_atom_bytes`; - `:bytes_total` for `erlang_vm_memory_bytes`; - `:dets_tables` for `erlang_vm_dets_tables`; - `:ets_tables` for `erlang_vm_ets_tables`; - `:processes_bytes_total` for `erlang_vm_memory_processes_bytes`; - `:system_bytes_total` for `erlang_vm_memory_system_bytes`. By default all metrics are enabled.