Determine and output database sizes

In the following datasources:

/manager/manager/appng-manager/platform#tab_databaseConnections
/manager/manager/appng-manager/sites/update/1#tab_databaseConnections

(Platform- and site-specific database connections)

It should be possible to trigger the determination of database sizes.

• manually (button at the datasource)
• automatically (scheduler job). For automatic detection, it should be sufficient to determine database sizes once per day.
• To maintain a history of database growth, the values should also be written to the audit log (APPNG-2082).

This feature should be available for all database systems supported by appNG.