What is Oracle AQ used for?

What is Oracle AQ used for?

Oracle AQ is used as the internal Java Message Service provider in the Oracle Enterprise Service Bus. In addition to asynchronous message exchanges (point-to-point and publish–subscribe), Oracle AQ can also perform message transformation via SQL functions.

What is AQ tables in Oracle?

The AQ$ Queue_Table_Name view describes the queue table in which message data is stored. This view is automatically created with each queue table and should be used for querying the queue data. The dequeue history data (time, user identification and transaction identification) is only valid for single-consumer queues.

What is AQ and MQ?

Aq is Oracle Advanced queuing as like IBM’s Websphere MQ,thougn it doesn’t have those many features as in MQ but still its being used. Advanced Queuing provides the message management functionality and asynchronous communication needed for application integration. AQ only interacts with database queues.

What should I monitor in Oracle Database?

With the System Statistics page of the Oracle Database XE graphical user interface, you can monitor the following types of database statistics:

• Physical Input/Output (I/O)
• Logical I/O.
• Memory usage.
• CPU time and wait events.
• SQL cursors.
• Transactions committed.

What is AQ in database?

Oracle Advanced Queuing (AQ) provides enterprise message functionality across many industries and is widely used within the database itself. Standard SQL can query messages and their metadata. Indexes can be used to optimize access to messages.

What is Oracle Streams AQ?

Oracle Streams AQ provides the message management and communication needed for application integration. In an integrated environment, messages travel between the Oracle Database server, applications, and users, as shown in Figure 1-1.

What is JMS in Oracle?

A ConnectionFactory encapsulates a set of connection configuration parameters that has been defined by an administrator. A client uses it to create a connection with a JMS provider. In this case Oracle JMS, part of Oracle Database, is the JMS provider. The three types of ConnectionFactory objects are: ConnectionFactory.

What is Dbms_aq?

The DBMS_AQ package provides an interface to Oracle Streams Advanced Queuing (AQ). Oracle Streams Advanced Queuing User’s Guide. Oracle Streams AQ TYPEs for information about TYPE s to use with DBMS_AQ.

What are Oracle tools?

Database Application Development

• Application Express.
• Berkeley DB Family.
• Oracle Database XE.
• Oracle Database Mobile Server.
• Oracle SQL Developer.
• Oracle SQL Developer Command Line (SQLcl)
• Oracle SQL Developer Data Modeler.
• Oracle TimesTen In-Memory Database.

What are monitoring tools in Oracle?

Oracle Performance Manager is a flexible, extensible, and easy-to-use tool for monitoring database performance in real-time. It provides dozens of predefined charts for displaying a wide variety of database performance statistics regarding users, throughput, tablespaces, redo logs, buffers, caches and I/O, for example.

How does AQ work in Oracle Streams AQ?

Oracle Streams AQ allows applications to block on one or more queues waiting for the arrival of either a newly enqueued message or a message that becomes ready. You can use the DEQUEUE operation to wait for the arrival of a message in a single queue or the LISTEN operation to wait for the arrival of a message in more than one queue.

What does Oracle Streams Advanced Queuing do for database?

Oracle Streams Advanced Queuing supports system-level access control for all queuing operations, allowing an application designer or DBA to designate users as queue administrators. A queue administrator can invoke Oracle Streams Advanced Queuing administrative and operational interfaces on any queue in the database.

How to hide a bad message in Oracle Streams AQ?

Oracle Streams AQ allows users to hide the bad message for a specified retry delay interval, during which it is in the WAITING state. After the retry delay, the failed message is again available for dequeue. The Oracle Streams AQ time manager enforces the retry delay property. The default value for retry delay is 0.

What does the Aq$ queue _ privileges view show?

The QUEUE_PRIVILEGES view describes queues for which the user is the grantor, grantee, or owner. It also shows queues for which an enabled role on the queue is granted to PUBLIC. The AQ$Queue_Table_Name view describes the queue table in which message data is stored.