Explanation:

Specified in seconds. Controls how often database changes are applied to the run time database directory cache. A lower interval may result in lower restart times but more CPU utilization and I/O utilization. This notes.ini setting replaces DBDIR_REFRESH_INTERVAL.
900 seconds (default) - By default, database changes are applied to the run time database directory cache every 900 seconds (15 minutes).

Applies to:

Servers (8.5 or later)

Default Value:

None

UI Equivalent:

None

Syntax:

DBDir_Cache_Save_to_DB_Interval = value