Async Logging Guide

Async Logging

Log.apex implements async logging by buffering all logging requests into a queue, and flush the queue in a queueable job to finally complete the logging.

Therefore, a very important thing is that you are forced to call flush at the end of the execution context. Otherwise, all the buffered logging requests are discarded.

logger.debug('message');

// ...

Log.flush();

Usually you put Log.flush() at the end of remote action calls, visualforce page controller actions, web service actions and so on.