Database layer

Applications share resources at the database layer, including disks, the transaction log, and data cache.

One database may have 2^31 (2,147,483,648) logical pages. These logical pages are divided among the various devices, up to the limit available on each device. Therefore, the maximum possible size of a database depends on the number and size of available devices.

The "overhead" is space reserved to the server, not available forany user database. It is:

Issues at the database layer include:

Options to address these issues include: