Oracle Application Server 10g Architecture and Administration - Instance Manager Home Page
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Instance Manager is somewhat of a misnomer. To Oracle DBAs, an instance is a running Oracle Database, while to Application Server 10g administrators, an instance refers to a J2EE app server or an infrastructure within their Application Server 10g farm.
For each instance, the Instance Manager page allows you to manage all of the Application Server 10g components. When you select a server from the OEM Farm page, you get the Instance Manager page with details on all components on that server (Figure 1-14). The top of the page displays the host name and status of the server. You also see CPU and RAM memory usage for the server. The bottom half of the page shows all of the Application Server 10g components on that server.
For each component, you see the current status (up or down), the start time for the component, and the relative amount of CPU and RAM usage for each component. By selecting a component and clicking the management buttons, you can start, stop, enable, disable, and configure each component on the instance. Let’s take a look at the links on this page.
- Infrastructure button -- The Infrastructure link allows you to associate Application Server (“instances”) components with database schemas. This includes associating a component to a schema in a database that is not in the farm’s infrastructure. This allows you to share schemas across instances that do not belong to a particular farm.
Logs button -- On the top right of this page, you can click the Logs link to see all of the log files for each component.
J2EE deployment button -- In the Home tab, you can click J2EE Applications to see a list of all J2EE applications that are deployed on this server.
Ports button -- This link displays the port numbers for each server component and allows you to change the port number for any component on the instance (server).
Managing Application Server 10g with Command-Line Interfaces
Many experienced Application Server 10g administrators prefer to use the command-line interfaces instead of EM. Remember, at the lowest level, EM generates the commands and parameters for Application Server 10g control files, and knowledgeable administrators already know the commands and parameters.
The command-line interfaces are spread across many file locations, and you will find Application Server 10g command-line programs in the following directories on your operating system:
$ORACLE_HOME/bin/
$ORACLE_HOME/dcm/bin/
$ORACLE_HOME/j2ee/home/
$ORACLE_HOME/ldap/bin/
$ORACLE_HOME/ldap/odi/admin/
$ORACLE_HOME/oca/bin/
$ORACLE_HOME/opmn/bin/
$ORACLE_HOME/portal/admin/plsql/sso/
$ORACLE_HOME/sso/lib/
$ORACLE_HOME/uddi/lib/
$ORACLE_HOME/upgrade/
$ORACLE_HOME/wireless/bin/
NOTE: To locate all of the command-line programs, you should always include the preceding directories in your $PATH variable. In UNIX, you can place in your .profile the ksh command (if you are using the Korn shell) or the csh command (if using the C shell).
The Oracle command-line utilities will be mentioned throughout this text, but let’s just take a quick tour so you can see how they are used to manage Application Server 10g. Table 1-1 shows all 59 of the command-line executables with Application Server 10g.
 This chapter is from Oracle Application Server 10g Administration Handbook, by Garmany and Burleson. (McGraw-Hill/Osborne, 2004, ISBN: 0072229586). Check it out at your favorite bookstore today. Buy this book now.
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