Are subscription licenses locked to particular application stack or CPU?
Licenses can be floated between similar stacks; e.g., between JVMs, but are specific to the language originally purchased for and cannot be converted from one language to another at a later date.
How about some details on database pricing?
Database Visibility is priced by database instance units. Units are counted differently depending on the database platform you need monitored. When monitoring Oracle Database or IBM DB2, if an instance exceeds more than 8 cores, then an extra unit is needed for each 8 core. Example, single instance Oracle database with 32 core requires 4 units.
Database Visibility also supports monitoring of NetApp storage. Units are counted differently depending on the NetApp storage series you need monitored. FAS2nnn and FAS3nnn series need 1 unit per NetApp controller. FAS6nnn and FAS8nnn series need 2 units per NetApp controller.