system catalog tables

All the system catalog tables for the database are stored in the catalog table space. Every database requires one catalog table space that cannot be dropped. The default name is SYSCATSPACE.

When you create a database, system catalog tables are also created at the same time. These system tables grow as user tables, views, indexes, authorizations, and packages are added to the database. Initially, they use approximately 1600 KB of disk space.

The amount of space allocated for the catalog tables depends on the type of table space and the extent size for the table space.