|Oracle9i Network, Directory, and Security Guide
Release 1 (9.0.1) for Windows
Part Number A90165-01
This appendix describes Oracle Net Services configuration for Windows. For more specific information on Oracle Net Services configuration, see Oracle9i Net Services Administrator's Guide.
This appendix contains these topics:
The registry contains the entries for Oracle Net Services parameters and subkeys. To successfully add or modify Oracle Net Services configuration parameters, you must understand where they are located and the rules that apply to them.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services contains subkeys that correspond to services. Depending on what is installed, your Oracle Net Services consist of all or a subset of the following:
Each service subkey contains the parameters shown in TableA-1.
Specifies the service name.
Specifies the fully qualified path name of the executable invoked by the service and any command line arguments passed to the executable at runtime.
Specifies the logon user account and computer to which the service should log on.
In Oracle9i release 9.0.1, the listener is set to start automatically at system reboot. If you intend to use only the listener for all of your databases, ensure that only the Windows NT service for the listener, as listed in the Windows NT services Control Panel, is set to start automatically.
Oracle Corporation normally recommends that you only have a single net listener service running on a Windows NT computer at any one time. This single listener can support multiple databases. If you need to have two different net listener services running on a Windows NT computer at the same time, make sure that they are configured to listen on different TCP/IP port numbers.
If the same IP address and port are used for different listeners, then instead of the second and the consecutive listeners failing to bind as expected, it allows them to go ahead and listen on this IP address and port. This results in unexpected behavior of the listeners. This is a suspected Windows NT operating system problem with TCP/IP and has been reported to Microsoft.
You can use the following parameters on Windows NT, Windows 98, and Windows 95:
Oracle Net Service first checks for the parameters as environment variables, and uses the values defined. If environment variables are not defined, it searches for these parameters in the registry.
You can use the
LOCAL parameter to connect to the database without specifying a connect identifier in the connect string. The value for the
LOCAL parameter is the net service name in the
tnsnames.ora file located in the
For example, if the
LOCAL parameter is specified as
finance, you connect to a database from SQL*Plus with the following command:
Oracle Net Services checks if
LOCAL is defined as an environment variable or as a parameter in the registry, and uses
finance as the service name. If it exists, Oracle Net connects.
You can add the
TNS_ADMIN parameter to change the directory name for configuration files from the default location. For example, if you set
test\admin, the configuration files are used from
You can set the
USE_SHARED_SOCKET parameter to
true to enable the use of shared sockets. If this parameter is set to
true, the network listener passes the socket descriptor for client connections to the database thread. As a result, the client does not need to establish a new connection to the database thread and database connection time improves. Also, all database connections share the port number used by the network listener, which can be useful if you are setting up third-party proxy servers.
This parameter only works in dedicated server mode in a TCP/IP environment. If this parameter is set, you cannot use the 9.0 listener to spawn Oracle 7.x databases. To spawn a dedicated server for an Oracle database not associated with the same Oracle home as the listener and have shared socket enabled, you must also set the variable
USE_SHARED_SOCKET for both Oracle homes.
The following sections describe advanced configuration procedures specifically for Oracle Net Services on the Windows operating systems.
Oracle Net Services provides authentication methods for Windows operating systems using Windows Native Authentication.
The network listener service may be unable to open the Named Pipe created by Oracle Names unless the
TNSListener service has a valid user ID and password associated with it.
To set up the network listener permissions:
The Services window appears.
The Services dialog box appears.
The Add User dialog box appears.
The user ID appears in the Add Name text box.
The Services dialog box appears with the user ID displayed in the This Account text box.
If you use the Named Pipes protocol for Windows 95 to connect to Oracle9i for Windows NT, client applications may run very slowly due to a known problem in Microsoft's implementation of Windows 95 NWLinkDirect-Hosting.
To work around this problem, you may do any of the following:
Oracle TCP/IP support for Windows 95/98 uses Windows Sockets 2 interfaces. Therefore, you must install Windows Socket 2 Update for Windows 95 before installing Oracle9i. Download it from the following Microsoft Web site:
Windows Socket 2 Update for Windows 95 can also be installed by double-clicking on the file
WS2SETUP.EXE located in the
\WINSOCK2 directory at the root of your distribution media.