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# holoscan::set_log_level

> Set global logging level.

```cpp showLineNumbers={false}
void holoscan::set_log_level(
    LogLevel level
)
```

Set global logging level.

If the environment variable `HOLOSCAN_LOG_LEVEL` is set, the log level will be overridden by the value of the environment variable.

`HOLOSCAN_LOG_LEVEL` can be set to one of the following values:

* TRACE
* DEBUG
* INFO
* WARN
* ERROR
* CRITICAL
* OFF

**Parameters**

**`level`** `LogLevel`

The new log level.

---

**Example**

```cpp showLineNumbers={false}
export HOLOSCAN_LOG_LEVEL=TRACE
```