---
title: "Metrics"
slug: "composer-monitor-metrics"
updated: 2026-02-26T07:56:42Z
published: 2026-02-26T07:56:42Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://composer.docs.vindral.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Extended Prometheus Metrics

If you have licensed the optional [Extended Monitoring Plugin](/v1/docs/extended-monitoring), or if you are using the [Trial version](/v1/docs/license) of Composer, the Prometheus endpoint will expose extended metrics. There are a few metrics that do not require the extended monitoring license, [read more](/v1/docs/settings-metrics).

All extended metrics have the **_ext_**-prefix.

Extended monitoring plugin licenseIf you do not have the extended monitoring plugin license, all **_ext_** metrics will be shown as 0 and do not update

Here is a list of all available metrics:

## GPU

| **Metrics** | **Type/Unit** | **Description** |
| --- | --- | --- |
| composer_ext_gpu_power_usage_percentage | % | **Current power utilization** |
| composer_ext_gpu_power_usage | W | **Current power usage** |
| composer_ext_gpu_power_limit | W | **Current power consumption limit of the GPU** |
| composer_ext_gpu_power_state | Number | **The power state the GPU is running (lower = faster, higher = slower)** |
| composer_ext_gpu_power_management_enabled | Boolean | Nvidia's "Prefer maximum Performance" value |
| composer_ext_gpu_utilization | % | Current GPU utilization (dependent on the GPU power state) |
| composer_ext_gpu_encoder_utilization | % | GPU NVENC utilization (Nvidia encoding) |
| composer_ext_gpu_decoder_utilization | % | GPU NVDEC utilization (Nvidia decoding) |
| composer_ext_gpu_memory_total | GB | Total GPU memory, as reported by nvidia-smi |
| composer_ext_gpu_memory_used | GB | Total GPU memory used, as reported by nvidia-smi |
| composer_ext_gpu_memory_available | GB | Total GPU memory available, as reported by nvidia-smi |
| composer_ext_gpu_temperature | Celcius | GPU temperature, as reported by nvidia-smi |

## Processing

| **Metrics** | **Type/Unit** | **Description** |
| --- | --- | --- |
| composer_last_frame_processing_time | ms | Last frame processing time |
| composer_average_processing_time | ms | Average processing time, last 50 rendered frames |
| composer_ext_last_frame_processing_usage | % | Last frame processing time, expressed as a percentage of available time (depending on FPS) |
| composer_max_processing_time | ms | Max processing time since application start |
| composer_ext_average_processing_time_10k_frames | ms | Average processing time of the last 10,000 rendered frames |
| composer_ext_average_processing_usage_10k_frames | % | Average processing load for the last 10,000 rendered frames |
| composer_congestions_last_second | Number | The number of congestions last second |
| composer_congestive_frames_since_start | Number | The number of congestive frames since the application started |
| composer_frames_processed_total | Number | Number of frames processed since application start |
| composer_processing_queue_length | Number | The current processing queue (frames) |
| composer_ext_worker_queue_flushes | Number | The number of Worker queues that have been flushed since the application started. |

## Alarms

| **Metrics** | **Type/Unit** | **Description** |
| --- | --- | --- |
| composer_ext_alarms_currently_active | Boolean | True if there are any active alarms |
| composer_ext_alarms_total_count | Number | Number of alarms since application start |

## Errors & Warnings

| **Metrics** | **Type/Unit** | **Description** |
| --- | --- | --- |
| composer_fatal_error_count_total | Number | Total number of fatal errors since application start |
| composer_error_count_total | Number | Total number of errors since application start |
| composer_warning_count_total | Number | Total number of warnings since application start |

## RTMP

| **Metrics** | **Type/Unit** | **Description** |
| --- | --- | --- |
| composer_ext_rtmp_target_count | Number | Total number of RTMP targets |
| composer_ext_rtmp_target_all_connected | Boolean | True if all RTMP targets are connected to the endpoint |
| composer_ext_rtmp_target_connected_count | Number | Total number of connected targets |
| composer_ext_rtmp_target_disconnected_count | Number | Total number of disconnected targets |
| composer_ext_rtmp_target_auto_reconnect_count | Number | Total number of reconnects |
| composer_ext_rtmp_target_connecting_count | Number | Total number of targets trying to connect to the endpoint |
| composer_ext_rtmp_target_reconnecting_count | Number | Total number of targets in the process of reconnecting to the endpoint |
| composer_ext_rtmp_target_disconnecting_count | Number | Total number of targets in the process of disconnecting from the endpoint |
| composer_ext_rtmp_target_error_count | Number | Total number of errors since application start |
| composer_ext_rtmp_target_errors | Number | Current number of RTMP errors |
| composer_ext_rtmp_target_warning_count | Number | Total number of warnings since application start |
| composer_ext_rtmp_target_warnings | Number | Current number of RTMP warnings |
| composer_ext_rtmp_target_sum_outgoing_bitrate | Mb/s | Total outgoing bitrate |
| composer_ext_rtmp_target_x64_count | Number | Total number of targets using CPU for encoding |
| composer_ext_rtmp_target_nvenc_count | Number | Total number of targets using NVEnc for encoding |
| composer_ext_rtmp_target_avg_video_encode_time | ms | Average video encoding time |
| composer_ext_rtmp_target_avg_network_write_time | ms | Average network write time |
| composer_ext_rtmp_target_max_pts_diff | ms | Maximum PTS (presentation timestamp) difference between video and audio |

## Application resources

| **Metrics** | **Type/Unit** | **Description** |
| --- | --- | --- |
| composer_gpu_ram_usage | GB | Total GPU ram usage |
| composer_ext_system_memory_usage | MB | Total system ram usage |
| composer_ext_system_memory_usage_avg_10min | Bytes | Average total system ram usage over 10 min |
| composer_ext_system_memory_usage_max_10min | Bytes | Max total system ram usage over 10 min |
| composer_ext_system_memory_usage_min_10min | Bytes | Min total system ram usage over 10 min |

## WebSockets

| **Metrics** | **Type/Unit** | **Description** |
| --- | --- | --- |
| composer_ext_websocket_clients_connected | Number | The number of connected clients |
| composer_ext_websocket_outgoing_message_count_total | Number | Total number of outgoing messages |
| composer_ext_websocket_incoming_message_count_total | Number | Total number of incoming messages |
| composer_ext_websocket_processing_time_ms | ms | The average processing time in ms |
| composer_ext_websocket_ingress_bytes_per_second | B/s | The ingress speed in bytes per second |
| composer_ext_websocket_ingress_bytes_per_second_average | B/s | The calculated average ingress speed in bytes per second |
| composer_ext_websockets_incoming_queue_size | Number | The current queue size of incoming messages |
| composer_ext_websocket_egress_bytes_per_second | B/s | The egress speed in bytes per second |
| composer_ext_websocket_egress_bytes_per_second_average | B/s | The calculated average egress speed in bytes per second |
| composer_ext_websockets_outgoing_queue_size | Number | The current queue size of outgoing messages |

## Misc

| **Metrics** | **Type/Unit** | **Description** |
| --- | --- | --- |
| composer_ext_project_fps | Number | The project FPS value |
| composer_ext_api_call_count | Number | Total number of API calls since application start |
| composer_ext_runtime_state_enum | Number | Displays the dropdown "Runtime state" in Settings/General as a value: 100 = "Not used in production (IDLE)" 101 = "Used for development purposes (DEV)" 102 = "Used for testing (TEST)" 103 = "Live in production (LIVE)" 104 = "Spare (SPARE)" 105 = "Reserved (RESERVED)" 106 = "UNKNOWN" |