Doc issue, can be done with Yii.

Add this in your config.php
'log' => array(
'class' => 'CLogRouter',
'routes' => array(
'file' => array(
'class' => 'CFileLogRoute',
'categories' => 'system.*',
),
)
),

It log ALL DB instruction to tmp/runtime/application.log

For specific logging, maybe we can add "Yii::log($message, $level, $category);" at some place.
But when ?

Denis, can you show an example of how the log should look like?

I have added the above to my LS 2.06 config.php, no errors, but also no log file create at /tmp/runtime.

Do I manually have to create file application.log?

@Mazi : no, but i need to do more test : seems set config to 0 disable a lot of txt log ....

Let me check something in 2.06