# Monitoring the Oracle Data Guard switchover
<a name="oracle-switchover.monitoring"></a>

To check the status of your instances, use the Amazon CLI command `describe-db-instances`. The following command checks the status of the DB instance {{orcl2}}. This database was a standby database before the switchover, but is the new primary database after the switchover.

```
aws rds describe-db-instances \
    --db-instance-identifier {{orcl2}}
```

To confirm that the switchover completed successfully, query `V$DATABASE.OPEN_MODE`. Check that the value for the new primary database is `READ WRITE`.

```
SELECT OPEN_MODE FROM V$DATABASE;
```

To look for switchover-related events, use the Amazon CLI command `describe-events`. The following example looks for events on the {{orcl2}} instance.

```
aws rds describe-events \
    --source-identifier {{orcl2}} \
    --source-type db-instance
```