These metrics are available for all database platforms supported.

Metrics	Description
Calls per Minute	The number of SQL calls to the database per minute.
DB Availability	The times when the database is available (has an active connection). If the database is not available, nothing is reported.
Number of Connections	The number of connections established with the database at any point during the selected time period. A connection is a session established between a database client and a server. Since the value displayed is the average number of connections over a time range, it is common to see a very low number or 0 for this metric.
Time Spent in Execution (s)	The current amount of time the database spent executing SQL statements.
Total Database Size (PostgreSQL only)	The amount of disk space (in MB) that the database is using.