Situations when fast recovery is initiated

Every time that the administrator brings the database server to quiescent, administration, or online mode from offline mode, the database server checks to see if fast recovery is required.

As part of shared-memory initialization, the database server checks the contents of the physical log. The physical log is empty when the database server shuts down under control. The move from online mode to quiescent mode includes a checkpoint, which flushes the physical log. Therefore, if the database server finds pages in the physical log, the database server clearly went offline under uncontrolled conditions, and fast recovery begins.