Change local queue attributes

We can change queue attributes in two ways, using either the ALTER QLOCAL command or the DEFINE QLOCAL command with the REPLACE attribute.

In Defining a local queue, the queue called ORANGE.LOCAL.QUEUE was defined. Suppose, for example, to decrease the maximum message length on this queue to 10,000 bytes.

• Use the ALTER command:

  ALTER QLOCAL (ORANGE.LOCAL.QUEUE) MAXMSGL(10000)
  

  This command changes a single attribute, that of the maximum message length; all the other attributes remain the same.

• Use the DEFINE command with the REPLACE option, for example:

  DEFINE QLOCAL (ORANGE.LOCAL.QUEUE) MAXMSGL(10000) REPLACE
  

  This command changes not only the maximum message length, but also all the other attributes, which are given their default values. The queue is now put enabled whereas previously it was put inhibited. Put enabled is the default, as specified by the queue SYSTEM.DEFAULT.LOCAL.QUEUE.

  If you decrease the maximum message length on an existing queue, existing messages are not affected. Any new messages, however, must meet the new criteria.