Maintaining Database Parameters: Oracle
Use
This function allows you to:
Procedure
To call DB parameter maintenance, choose Tools ® CCMS ® DB administration ® DB parameters. Alternatively, call Transaction DB27.
The frame Number of database profile parameters includes the number of:
The individual database parameters are displayed in a table. The table includes the following columns:
Column |
Meaning |
Name |
Name of the database parameters |
Val. (value) |
Value of the database parameter |
Alarm |
Status of the database parameter Red The value of the database parameter is different than the threshold value or not within the validity range specified in the database system check. The severity of this value is set to Error. Yellow The value of the database parameter is different than the threshold value or not within the validity range specified in the database system check. The severity of this value is set to Warning. Green The value of the database parameter is identical to the threshold value or within the validity range specified in the database system check or the parameter is not checked by the database system check. For more information, see Configure Database System Checks |
Description |
Oracle documentation for the database parameter |
Modif. |
Was the parameter modified since the last database start? FALSE The parameter has not been modified since the last database start. MODIFIED The parameter was modified using the command ALTER SESSION ... since the last database start. SYS_MODIFIED The parameter was modified using the command ALTER SYSTEM ... since the last database start. |
Default |
Is the parameter a default Oracle database system parameter? TRUE Default parameter in Oracle database system FALSE Not a default parameter in Oracle database system |
Ses.modif. |
Can the database parameter be modified during the session? TRUE The parameter can be modified during the session using the command ALTER SESSION ... FALSE The parameter cannot be modified during the session Modifying a parameter immediately affects the database user session in which the parameter was modified. In the SAP context this means that all SAP user sessions whose dialog steps are processed by this database work process will be affected by the change. |
Sys.modif |
Is the database parameter system-modifiable? IMMEDIATE The parameter can be changed using the command ALTER SYSTEM ... meaning it takes affect for all current database user sessions and therefore for the entire SAP System. DEFERRED The parameter can be changed using the command ALTER SYSTEM ... and it takes affect for all future database user sessions (for example, for SAP application servers started after the change went into effect). FALSE The parameter is not system-modifiable In order to use the command ALTER SYSTEM ... you must have an authorization for ALTER SYSTEM for the database. |
Adjust. |
Was the parameter automatically modified by the database system? TRUE The parameter was automatically modified by the database system FALSE The parameter was not automatically modified by the database system |
Activities
Sorting database parameters according to date
To move the last database parameters changed to the top of the table, choose Sort date in ascending order. To move the last database parameters changed to the bottom of the table, choose Sort date in descending order.
Displaying specific views of database parameters
Choose:
Updating database parameter display
To update the display of database parameters, choose Refresh
Displaying details and history for a database parameter
In addition to the details and history for the database parameter, the system also displays the threshold value specified in the database system check.
Displaying history for all database parameters
Choose Goto ® Total history
Changing database parameters
Only system-modifiable database parameters can be changed online. These parameters have either the value IMMEDIATE or DEFERRED in the Sys.modif column.
To make the change effective even after a database restart, you must maintain the database parameter in the init<SID>.ora Oracle initialization file. This file is usually located in the directory $ORACLE_HOME/dbs (UNIX) or %ORACLE_HOME%\dbs (NT).
Displaying the
init<SID>.ora Oracle initialization fileTo display the Oracle initialization file init<SID>.ora, choose Display Oracle profile.