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Background documentation Restart Locate the document in its SAP Library structure

When a database instance is restarted, it is switched from the operational state OFFLINE, ADMIN, or ONLINE to the OFFLINE operational state, and then switched to the ONLINE operational state again.

A restart is necessary, for example, in the following situations:

·        You have changed database parameters.

·        The database instance was not stopped correctly because the computer was switched off due to a power failure.

When it is restarted, the database system uses the information from the last savepoint and the log entries from the database instance to repeat the effects of completed transactions on the data volumes (ROLL FORWARD) and to reverse the effects of open transactions (ROLLBACK).

For a restart to be successful, the volumes in the database instance must not be damaged. If the hard disk has been damaged, you must restore the database instance.

You can also restart the database instance in a state it was in at a point in time in the past.

See also:

·        Concepts of the Database System, Using Log Entries for a Restart or Recovery

·        Database Manager GUI, Starting the Database Instance (restart)

·        Database Manager CLI, Restarting the Database Instance

 

 

 

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