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1.85 DISPATCHERS → Property Description Parameter type String Syntax DISPATCHERS = ' dispatch_clause ' Syntax … ) [options_clause] Syntax options_clause::= (DISPATCHERS = integer | SESSIONS = integer | CONNECTIONS = integer … DISPATCHERS defaults to '(PROTOCOL=tcp)', causing 1 TCP/IP dispatcher to be created. Modifiable ALTER SYSTEM … Modifiable
5.3.4 Configuring Dispatchers → by the DISPATCHERS initialization parameter and system resources. To protect shared memory by … initialization parameter. 5.3.4 Configuring Dispatchers The DISPATCHERS initialization parameter configures … protocol. The equivalent DISPATCHERS explicit setting of the initialization parameter for this … configuration
About Dispatchers → uses direct hand off whenever possible. Redirect messages are used, for example, when dispatchers are
Monitoring Dispatchers → Use the following views to check configurations and monitor dispatchers: V$QUEUE: Contains … index number. V$DISPATCHER_CONFIG: Provides configuration information about the dispatchers. V … Reference for additional information about configuring the DISPATCHERS parameter and supported
About Dispatchers → Shared memory resources for dispatchers, virtual circuits, and shared servers are preconfigured … enable shared servers at runtime. Database administrators can start dispatchers and shared servers with … turned on, a dispatcher is started automatically on the TCP/IP protocol even if the DISPATCHERS … parameter has not been set.
5.3.5 Disabling Shared Server → 126.96.36.199 Determining the Number of Dispatchers Once you know the number of possible connections for … each process for the operating system, calculate the initial number of dispatchers to create during … instance startup, for each network protocol. To calculate the initial number of dispatchers to … create during instance startup,
Attribute Description → 188.8.131.52 DISPATCHERS Initialization Parameter Attributes You can set several attributes for the … DISPATCHERS initialization parameter. A protocol address is required and is specified using one or more … the endpoint on which the dispatchers listen. DESCRIPTION Specify the network description of the … endpoint on which the dispatchers
5.3.3 Enabling Shared Server → … Dispatchers are discussed in \" Configuring Dispatchers \". Note: If SHARED_SERVERS is not included in … the initialization parameter file at database startup, but DISPATCHERS is included and it specifies … . If neither SHARED_SERVERS nor DISPATCHERS is included in the initialization file, you cannot start
5.3.6 Shared Server Data Dictionary Views → $DISPATCHER_CONFIG Provides configuration information about the dispatchers. V$DISPATCHER_RATE Provides rate … virtual circuits, which are user connections to the database through dispatchers and servers. V
5.3.1 Initialization Parameters for Shared Server → dedicated servers. DISPATCHERS: Configures dispatcher processes in the shared server architecture … dispatchers is auto-tuned according to the number of concurrent connections. CIRCUITS: Specifies
C.3.1 alter system set dispatcher → dispatchers to get started. Wait Time: The session will wait 1 / 100 of a second and verify if the new … dispatchers have started, else the session will wait again Parameter Description waited Number of times that the session has waited 1 / 100 of a second
Identifying and Reducing Contention Using the Dispatcher-Specific Views → consider reducing the number of dispatchers. Conversely, if current and average rates are close to the … maximums, then you might need to add more dispatchers. A general rule is to examine V$DISPATCHER_RATE … maximized, it is not necessarily a good idea to immediately add more dispatchers. Instead, consider … multiple users to
7.155 V$DISPATCHER_CONFIG → … Column Datatype Description CONF_INDX NUMBER Zero-based index of the DISPATCHERS configuration … NETWORK VARCHAR2(1024) Network protocol or listening address of dispatchers (may be truncated … ) DISPATCHERS NUMBER Number of dispatchers to maintain for the configuration CONNECTIONS NUMBER Maximum number
1.151 MAX_DISPATCHERS → greater than or equal to the number of dispatchers specified by the DISPATCHERS parameter and less … overridden by the DISPATCHERS parameter and is maintained for backward compatibility with older releases
Shared Server Architecture → dispatchers or dedicated servers (the listener is part of Oracle Net Services, not Oracle Database
8.6.1 Desupport of Oracle Net Connection Pooling → connection pooling was deprecated in Oracle Database 11 g. This includes the DISPATCHERS attributes TICKS
The listener registration process LREG registers information about the database instance and dispatcher… → its current and maximum load Service handlers (dispatchers and dedicated servers) available for the
The alert log is an XML file that is a chronological log of messages and errors. → ' db_recovery_file_dest_size=2G diagnostic_dest='' dispatchers='(PROTOCOL=TCP) (SERVICE=ORCLXDB)' open_cursors=300
The PGA is memory specific to an operating process or thread that is not shared by other processes or… → Net Services Administrator's Guide to learn how to configure dispatchers Shared Server Processes (S
ORA-00134: invalid DISPATCHERS specification # string → Cause: The syntax for the n-th DISPATCHERS specification was incorrect. Action: Refer to the Oracle Reference Manual for the correct syntax.