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Oracle: File Watchers

A file watcher is a scheduler object that triggers the scheduler to start a job when a file with a given name and location «arrives».
By default, a file watcher checks for new file arrivals every 10 minutes.
A file watcher object is created with dbms_scheduler.create_file_watcher.
In order to use file watchers, the database Java Virtual Machine (JVM) component must be installed.

Change the default exection interval

Change the default execution interval to one minute: 
begin
 
   dbms_scheduler.set_attribute(
      'file_watcher_schedule',
      'repeat_interval',
      'freq=minutely; interval=1'
   );
 
end;
/

See also

An example for a file watcher
Troubleshooting file watcher problems.
dbms_ischedfw
Under the hood of file watchers.
$ORACLE_HOME/rdbms/admin/initscfw.sql
The .NET class System.IO.FileSystemWatcher.
Database objects

Index

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