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One of the following attributes—PROTOCOL, ADDRESS, or DESCRIPTION—can be set with dispatchers. PROTOCOL defines the network protocol to use, ADDRESS defines the network protocol address on which the dispatchers listen, and DESCRIPTION is the network description. Default values are used if the attributes are not defined, and additional network options can be defined if the ADDRESS or DESCRIPTION attribute is set.
Additional attributes that can be set with ADDRESS or DESCRIPTION include the following:
SESSIONS Defines the maximum number of network sessions per dispatcher.
CONNECTIONS Defines the maximum number of network connections per dispatcher.
TICKS Defines the length of a network tick (seconds). A tick defines the length of time for a message to get from the client to the database server or from the database server to the client.
POOL Defines the timeout in ticks for incoming (IN=15) and outgoing (OUT=20) connections, and whether connection pooling is enabled. The number of ticks multiplied by the POOL value determines the total connection pool timeout.
MULTIPLEX Defines if multiplexing with the Connection Manager is set for incoming and outgoing connections. Multiplexing allows multiple sessions to transport over a single network connection. This is used to increase the network capacity for a large number of sessions.
LISTENER Defines the network name of an address for the listener.
SERVICE Defines the server names that dispatchers determine with the listeners.
INDEX Defines which dispatcher should be modified.
In your init.ora file, you will define the dispatchers. The following are examples of different types of entries that will typically be created to support shared servers:
Define the number of dispatchers to start:
DISPATCHERS='(PROTOCOL=TCP) (DISPATCHERS=5)'
Define a dispatcher to start on a specific port:
DISPATCHERS='(ADDRESS=(PROTOCOL=TCP) (DISPATCHERS=5))'
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