\*1: `TZ` should be set to a `TZ identifier` from [this list][tz-list]. For example, `TZ="Etc/UTC"`.
`TZ` is used by `exiftool` as a fallback in case the timezone cannot be determined from the image metadata. It is also used for logfile timestamps and cron job execution.
\*2: This path is where the Immich code looks for the files, which is internal to the docker container. Setting it to a path on your host will certainly break things, you should use the `UPLOAD_LOCATION` variable instead.
\*1: The values of `DB_USERNAME`, `DB_PASSWORD`, and `DB_DATABASE_NAME` are passed to the Postgres container as the variables `POSTGRES_USER`, `POSTGRES_PASSWORD`, and `POSTGRES_DB` in `docker-compose.yml`.
\*2: If not provided, the appropriate extension to use is auto-detected at startup by introspecting the database. When multiple extensions are installed, the order of preference is VectorChord, pgvecto.rs, pgvector.
\*3: Uses either [`postgresql.ssd.conf`](https://github.com/immich-app/base-images/blob/main/postgres/postgresql.ssd.conf) or [`postgresql.hdd.conf`](https://github.com/immich-app/base-images/blob/main/postgres/postgresql.hdd.conf) which mainly controls the Postgres `effective_io_concurrency` setting to allow for concurrenct IO on SSDs and sequential IO on HDDs.
All `DB_` variables must be provided to all Immich workers, including `api` and `microservices`.
`DB_URL` must be in the format `postgresql://immichdbusername:immichdbpassword@postgreshost:postgresport/immichdatabasename`.
You can require SSL by adding `?sslmode=require` to the end of the `DB_URL` string, or require SSL and skip certificate verification by adding `?sslmode=require&sslmode=no-verify`.
When `REDIS_URL` or `REDIS_SOCKET` are defined, the `REDIS_HOSTNAME`, `REDIS_PORT`, `REDIS_USERNAME`, `REDIS_PASSWORD`, and `REDIS_DBINDEX` variables are ignored.
| `MACHINE_LEARNING_MODEL_TTL` | Inactivity time (s) before a model is unloaded (disabled if \<= 0) | `300` | machine learning |
| `MACHINE_LEARNING_MODEL_TTL_POLL_S` | Interval (s) between checks for the model TTL (disabled if \<= 0) | `10` | machine learning |
| `MACHINE_LEARNING_CACHE_FOLDER` | Directory where models are downloaded | `/cache` | machine learning |
| `MACHINE_LEARNING_REQUEST_THREADS`<sup>\*1</sup> | Thread count of the request thread pool (disabled if \<= 0) | number of CPU cores | machine learning |
| `MACHINE_LEARNING_MODEL_INTER_OP_THREADS` | Number of parallel model operations | `1` | machine learning |
| `MACHINE_LEARNING_MODEL_INTRA_OP_THREADS` | Number of threads for each model operation | `2` | machine learning |
| `MACHINE_LEARNING_WORKERS`<sup>\*2</sup> | Number of worker processes to spawn | `1` | machine learning |
| `MACHINE_LEARNING_HTTP_KEEPALIVE_TIMEOUT_S`<sup>\*3</sup> | HTTP Keep-alive time in seconds | `2` | machine learning |
| `MACHINE_LEARNING_WORKER_TIMEOUT` | Maximum time (s) of unresponsiveness before a worker is killed | `120` (`300` if using OpenVINO) | machine learning |
| `MACHINE_LEARNING_PRELOAD__CLIP__TEXTUAL` | Comma-separated list of (textual) CLIP model(s) to preload and cache | | machine learning |
| `MACHINE_LEARNING_PRELOAD__CLIP__VISUAL` | Comma-separated list of (visual) CLIP model(s) to preload and cache | | machine learning |
| `MACHINE_LEARNING_PRELOAD__FACIAL_RECOGNITION__RECOGNITION` | Comma-separated list of (recognition) facial recognition model(s) to preload and cache | | machine learning |
| `MACHINE_LEARNING_PRELOAD__FACIAL_RECOGNITION__DETECTION` | Comma-separated list of (detection) facial recognition model(s) to preload and cache | | machine learning |
| `MACHINE_LEARNING_DEVICE_IDS`<sup>\*4</sup> | Device IDs to use in multi-GPU environments | `0` | machine learning |
| `MACHINE_LEARNING_MAX_BATCH_SIZE__FACIAL_RECOGNITION` | Set the maximum number of faces that will be processed at once by the facial recognition model | None (`1` if using OpenVINO) | machine learning |
\*4: Using multiple GPUs requires `MACHINE_LEARNING_WORKERS` to be set greater than 1. A single device is assigned to each worker in round-robin priority.
| `IMMICH_TELEMETRY_INCLUDE` | Collect these telemetries. List of `host`, `api`, `io`, `repo`, `job`. Note: You can also specify `all` to enable all | | server | api, microservices |
| `IMMICH_TELEMETRY_EXCLUDE` | Do not collect these telemetries. List of `host`, `api`, `io`, `repo`, `job` | | server | api, microservices |
