## Monitoring the Operational State

You can use the Database Manager GUI to monitor the operational state of each database instance.

### Prerequisites

1. Make sure that the database instance has been included in the list of database instances (see Managing the List of Database Instances).

2. Connect to the DBM server.

### Displaying the Operational State

Check the indicator assigned to the general icon for the database instance in the list of database instances.

You can use displays View ® Large Icons/Small Icons/List for this purpose.

| General database instance icon
| Database instance is in the OFFLINE operational state
| Database instance is in the ADMIN operational state
| Database instance is in the ONLINE operational state

Hot standby database instances have the following icons:

| Master instance or standby instance is in the OFFLINE operational state.
| Master instance is in the ADMIN operational state or standby instance is in the STANDBY operational state.
| Master instance is in the ONLINE operational state.

### Changing the Operational State

Select a database instance in the list of database instances by double-clicking it.

Choose Actions ® OFFLINE / ADMIN / ONLINE to change to the relevant operational state.

You cannot change the operational state of standby instances in a hot standby system directly. Standby instances are controlled by the master instance.

See also:

Starting (Restarting) the Database Instance

Stopping the Database Instance (Shutdown)