Cluster db alerts :

Cluster db alerts in Real Time: Data Guard

Data Guard Fast-Start Failover

Data Guard Performance

Data Guard Status

Database Cardinality

Database Job Status

Database Wait Bottlenecks

Deferred Transactions

Failed Logins

Flash Recovery

Invalid Objects

Invalid Objects by Schema

Recovery

Recovery Area

Response

Segment Advisor Recommendations

Session Suspended

Snapshot Too Old

Streams Processes Count

Suspended Session

Tablespace Allocation

Tablespaces Full

Tablespaces Full (dictionary managed)

Tablespaces With Problem Segments

User Block