Persistent Log

This module records specific kinds of log events in permanent storage, which is not truncated like the core watchdog log. It is particularly useful for capturing rare events in sites that generate a high volume of log messages, which would otherwise get lost quickly.

To set it up, visit “Reports -> Persistent log messages” after installation, and create a new log channel. The channel can filter messages by type, severity, and/or message text.

Each channel can be viewed and cleared individually.


Source: https://drupal.org/project/project_module/feed/all