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Top Forums Shell Programming and Scripting connecting to remote db from unix script Post 302135164 by DILEEP410 on Thursday 6th of September 2007 08:43:28 AM
Old 09-06-2007
Quote:
Originally Posted by robotronic
MTS are Multi-Threaded Servers, also called Shared Servers. It's an option you can configure on the db server (only if you really need it).

Usually, if MTS are not configured, your client contacts the remote listener, which spawns a Dedicated Server Process on an assigned port and puts in communication your user process with the server process. At this point the listener has finished its work and your client is in direct contact with a dedicated process (oracle<$SID>) on a dedicated port which serves only your session.

If you configure MTS on the server-side, instead, new processes are involved in the connection mechanism. First, at the instance startup, are spawned one or more Dispatcher Processes (ora_dNNN) and one or more Shared Server Processes (ora_sNNN). In this case, when your client asks the remote listener for establishing a session, the listener will not spawn any new process: it will simply tell your user process a port number on which a pre-started dispatcher process is listening. Your user process will then send the sql statements to the dispatcher, and the dispatcher puts the request in a common input queue. All the shared server processes are continuosly monitoring the common queue and pick up requests for executing the work. When the work is done, the result will be putted in the response queue of the dispatcher which made the request and the dispatcher fetches the result back to the user process.

MTS are used when the number of connections made to the db is so high that spawning a dedicated server process for each session will reduce the server performance due to the continuos context switches the OS has to do for mantaining all the processes active.
great!!I have some more queries related to this.In some of the scripts i saw some settings other than what we discussed till now as given below.Can you please give the instance when these was used and why?

export ORAENV_ASK=NO/YES
export ORACLE_SID="INRDELP1" (Oracle instance name)
export GLOBAL_NAME="INDBR432_INRDELP1.world" (Oracle database name with suffix)
 

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SPEECH-DISPATCHER(1)						   User Commands					      SPEECH-DISPATCHER(1)

NAME
speech-dispatcher - server process managing speech requests in Speech Dispatcher SYNOPSIS
speech-dispatcher [-{d|s}] [-l {1|2|3|4|5}] [-c com_method] [-S socket_path] [-p port] | [-v] | [-h] DESCRIPTION
speech-dispatcher is a server process that is responsible for transforming requests for text-to-speech output into actual speech hearable in the speakers. It arbitrates concurrent speech requests based on message priorities, and abstracts different speech synthesizers. Client programs, like screen readers or navigation software, send speech requests to speech-dispatcher using TCP protocol (with the help of client libraries). speech-dispatcher is usually started automatically by client libraries (i.e. autospawn), so you only need to run it manually if testing/debugging, or when in other explicit need for a special setup. OPTIONS
-d, --run-daemon Run as a daemon -s, --run-single Run as single application -a, --spawn Start only if autospawn is not disabled -l, --log-level Set log level (1..5) -c, --communication-method Communication method to use (unix_socket or inet_socket) -S, --socket-path Socket path to use for 'unix_socket' method (filesystem path or 'default') -p, --port Specify a port number for 'inet_socket' method -P, --pid-file Set path to pid file -C, --config-dir Set path to configuration -v, --version Report version of this program -D, --debug Output debugging information into /tmp/.speech-dispatcher -h, --help Print this info BUGS
Please report bugs to <speechd-bugs@freebsoft.org> SEE ALSO
spd-say(1) The full documentation for speech-dispatcher is maintained as a Texinfo manual. If the info and speech-dispatcher programs are properly installed at your site, the command info speech-dispatcher should give you access to the complete manual. speech-dispatcher 0.7.1 March 2011 SPEECH-DISPATCHER(1)
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