Advanced Queuing - Oracle

INIT.ORA Parameter File Considerations
AQ_TM_PROCESSES Parameter
A parameter called AQ_TM_PROCESSES should be specified in the init.ora
parameter file if you want to perform time monitoring on queue messages. Use this
for messages that have delay and expiration properties specified. This parameter
should be set to at least 1. It can be set in a range from 0 to 10. Setting it to any
other number will result in an error. If this parameter is set to 1, one queue monitor
process (QMN) will be created as a background process. If the parameter is not
specified, or is set to 0, the queue monitor process is not created.
Table 2–9 lists parameter information.
Table 2–9 AQ_TM_PROCESSES Parameter
Parameter Options
Parameter Name aq_tm_processes
Parameter Type integer
Parameter Class Dynamic
Allowable Values 0 to 10
Syntax aq_tm_processes =
Name of process ora_qmn_
Example aq_tm_processes = 1
JOB_QUEUE_PROCESSES Parameter
Propagation is handled by job queue (SNP) processes. The number of job queue
processes started in an instance is controlled by the init.ora parameter JOB_
QUEUE_PROCESSES. The default value of this parameter is 0. For message
propagation to take place, this parameter must be set to at least 2. The database
administrator can set it to higher values if there are many queues from which the
messages have to be propagated, or if there are many destinations to which the
messages have to be propagated, or if there are other jobs in the job queue.
See Also: Oracle9i SQL Reference for more information on JOB_
QUEUE_PROCESSES.
The Java Advanced Queuing API supports both the administrative and operational
features of Advanced Queuing. In developing Java programs for messaging
applications, you will use JDBC to open a connection to the database and then use
2-10 Oracle9i Application Developer’s Guide - Advanced Queuing