Oracle PL/SQL supplied packages that modify system metadata typically are not
supported by SQL Apply, and therefore their effects are not visible on the logical
standby database. Examples of such packages are DBMS_JAVA, DBMS_REGISTRY,
DBMS_ALERT, DBMS_SPACE_ADMIN, DBMS_REFRESH, DBMS_REDEFINITION, DBMS_
SCHEDULER, and DBMS_AQ.
Specific support for DBMS_JOB has been provided. Job execution is suspended on a
logical standby database and jobs cannot be scheduled directly on the standby
database. However, jobs submitted on the primary database are replicated in the
standby database. In the event of a switchover or failover, jobs scheduled on the
original primary database will automatically begin running on the new primary
database