As soon as you create a table, you can influence its storage parameters by maintaining its technical configuration. This technical configuration is used to optimize the space requirements and access response of individual tables. Always maintain at least the parameters Data class and Size category in the technical configuration for each table.

• Data class
  The data class logically defines the tablespace where your table is stored. When you select the correct logical table type, your table will automatically be assigned to the correct database area when it is created. The F1 help for the field Data class provides information on how to select the proper value for the table. The assignment data class - tablespace (for data) is done using the table TAORA; the assignment data class - tablespace (for indexes) using table IAORA.
• Size category
  The size category specifies the estimated space requirements of the table on the database using the categories 0 to 4. When you create a table an INITIAL extent is reserved on the database. If you need more space later, storage space is added corresponding to the selected category (NEXT extent). The F4 help on field Size category displays the number of data records that will fit in the assigned storage area of the database for each of the categories. Note that a maximum of 300 extents should be enough for storing table contents (with a database block size of 8 KB).