Preparing for Messaging

This topic describes actions that are required to prepare your databases for a messaging environment.

To prepare your databases for a messaging environment: 

1. Set the GLOBAL_NAMES initialization parameter to TRUE at each database involved in the messaging environment. See "Setting the GLOBAL_NAMES Initialization Parameter to TRUE" for instructions.

2. Configure network connectivity so that a database that sends messages can communicate with a database that receives messages. See Configuring the Network Environment for information about configuring network connectivity between databases.

3. Configure an Oracle Streams administrator at each database involved in the messaging environment. See "Tutorial: Configuring an Oracle Streams Administrator" for instructions.

4. Ensure that the Oracle Streams pool is large enough to accommodate the queues created for the messaging environment. Each queue requires at least 10 MB of memory. The Oracle Streams pool is part of the System Global Area (SGA). You can manage the Oracle Streams pool by setting the MEMORY_TARGET initialization parameter (Automatic Memory Management), the SGA_TARGET initialization parameter (Automatic Shared Memory Management), or the STREAMS_POOL_SIZE initialization parameter. See Oracle Streams Replication Administrator's Guide for more information about the Oracle Streams pool.