Measures reported by ProStorageAreaTest

Storage areas are the largest physical unit of a database. Storage areas consist of one or more extents that are either operating system files, or some other operating system level device that is addressed randomly. A storage area is a distinct address space, and any physical address stored inside the area is generally stored relative to the beginning of the storage area.

Storage areas are identified by their names. The number and type of storage areas used varies from database to database; however, all Progress databases contains a control area, a schema area, and a primary recovery area. Certain storage areas have restrictions on the types of extents they support. The storage areas of the Progress database is briefed below:

Control Area: The control area contains only one variable-length extent: the database structure extent, which is a binary file with a .db extension.

Schema Area: The schema area can contain as many fixed-length extents as needed; however, every schema area should have a variable-length extent as its last extent.

Primary Recovery Area: The primary recovery area can contain as many fixed-length extents as needed, as long as the last extent is of variable length.

Application Data Area: The application data storage area contains all application-related database objects.

Transaction Log Area: The transaction log storage area, used for two-phase commit, uses only fixed-length extents but can use more than one. The other storage areas can use many extents but only one variable-length extent, which must be the last extent.

This test auto-discovers all the storage areas of the Progress database server and tracks the usage of each of these storage areas.

Output of the test : One set of results for every storage area on the target Progress database server that is being monitored.

The measures made by this test are as follows: