# VM System Information Collector Collects Erlang VM metrics using [:erlang.system_info/1](http://erlang.org/doc/man/erlang.html#system_info-1). ## Exported metrics

```
erlang_vm_ets_limit
```
Type: gauge.
The maximum number of ETS tables allowed.
```
erlang_vm_logical_processors
```
Type: gauge.
The detected number of logical processors configured in the system.
```
erlang_vm_logical_processors_available
```
Type: gauge.
The detected number of logical processors available to the Erlang runtime system.
```
erlang_vm_logical_processors_online
```
Type: gauge.
The detected number of logical processors online on the system.
```
erlang_vm_ports
```
Type: gauge.
The number of ports currently existing at the local node.
```
erlang_vm_port_limit
```
Type: gauge.
The maximum number of simultaneously existing ports at the local node.
```
erlang_vm_processes
```
Type: gauge.
The number of processes currently existing at the local node.
```
erlang_vm_process_limit
```
Type: gauge.
The maximum number of simultaneously existing processes at the local node.
```
erlang_vm_schedulers
```
Type: gauge.
The number of scheduler threads used by the emulator.
```
erlang_vm_schedulers_online
```
Type: gauge.
The number of schedulers online.
```
erlang_vm_smp_support
```
Type: boolean.
1 if the emulator has been compiled with SMP support, otherwise 0.
```
erlang_vm_threads
```
Type: boolean.
1 if the emulator has been compiled with thread support, otherwise 0.
```
erlang_vm_thread_pool_size
```
Type: gauge.
The number of async threads in the async thread pool used for asynchronous driver calls.
```
erlang_vm_time_correction
```
Type: boolean.
1 if time correction is enabled, otherwise 0.

## Configuration Metrics exported by this collector can be configured via `:vm_system_info_collector_metrics` key of `:prometheus` app environment. Options are the same as Item parameter values for [:erlang.system_info/1](http://erlang.org/doc/man/erlang.html#system_info-1): - `:ets_limit` for `erlang_vm_ets_limit`; - `:logical_processors` for `erlang_vm_logical_processors`; - `:logical_processors_available` for `erlang_vm_logical_processors_available`; - `:logical_processors_online` for `erlang_vm_logical_processors_online`; - `:port_count` for `erlang_vm_ports`; - `:port_limit` for `erlang_vm_port_limit`; - `:process_count` for `erlang_vm_processes`; - `:process_limit` for `erlang_vm_process_limit`; - `:schedulers` for `erlang_vm_schedulers`; - `:schedulers_online` for `erlang_vm_schedulers_online`; - `:smp_support` for `erlang_vm_smp_support`; - `:threads` for `erlang_threads`; - `:thread_pool_size` for `erlang_vm_thread_pool_size`; - `:time_correction` for `erlang_vm_time_correction`. By default all metrics are enabled.