Creating a table space

Use this notebook to create a table space at the current server.

Authorities and privileges

To create a table space:

  1. Open the Create table space window.

  2. Enter a valid unique name for your table space. Once you have entered this name you can select OK to create your table space and exit the window.

  3. Optional: Select the type of table space that you want to create. If you select to create a nonpartitioned, segmented or LOB table space, the Partition Management tab on this notebook is not available.

  4. Specify the optional properties for this table space.

  5. Specify the appropriate information to manage this table space . This information describes the data set and space management.

  6. If you selected to define a partitioned table space, select the Partition Management tab to define the optional properties of each partition.

Related information

Specifying properties

Use this page of the notebook to describe the properties of the space.
  1. Optional: Select a buffer pool name. The name must identify an active buffer pool.

  2. Optional: Select a lock size to be used within this table space.

  3. Optional: Select the maximum number of page or row locks that an application process can hold simultaneously in the table space.

  4. Optional: The encoding scheme or coded character set identifier (CCSID) is used for the tables stored in the table space. Select whether you want to use ASCII or EBCDIC CCSIDs.

  5. Optional: Enter the maximum number of rows that DB2 will consider placing on each data page (MAXROWS). You can enter a value from 1 to 255, or accept the default of 255. If your table space is defined as large object table space (LOB), the value of MAXROWS must be zero.

  6. Optional: Select whether to set a maximum size for each partition or data set (DSSIZE). This is only applicable for LOB table spaces.

  7. Optional: Select whether to use the default CLOSE rule.

  8. Optional: This is applicable only for partitioned table spaces. Check to use selective partition locking (SPL) when locking a partitioned table space (LOCKPART YES).

  9. Optional: This is applicable only for LOB table spaces. Select the check box to Write changes to a LOB column in a LOB table space to the log. You cannot use this if the auxiliary table in the table space stored a LOB column that is greater than 1 gigabyte. For LOB table spaces, recording column changes to the log is the default.

  10. Optional: Select the check box to allow DB2 to choose where to locate data inserted by the INSERT statement in the table space based on available space. This is invalid for LOB table spaces.

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Managing your space

Use this page of the notebook to define the details of the space.
  1. Optional: Select whether the data set for the table space is managed by the user (VCAT). Then select a catalog name.

  2. Optional: If data sets are not to be managed by the user, then select Managed by DB2. You can then enter the storage group name.

  3. Optional: If you selected to have data sets managed by DB2, you should enter the minimum primary space allocation (PRIQTY). This field is not applicable if you selected data set management by USER.

  4. Optional: If you selected to have data sets managed by DB2, you should enter the minimum secondary space allocation (SECQTY). This field is not applicable if you selected data set management by USER.

  5. Optional: If you selected to have data sets managed by DB2, you should select an ERASE option. This field is not applicable if you selected data set management by USER.

  6. Specify to defer the physical creation of underlying VSAM data sets until the very first write operation occurs. The undefined table space has a DB2 Catalog entry. The default is to not defer the creation.

  7. Optional: Select to choose to manage the free space (FREEPAGE and PCTFREE) amount.

  8. The cached pages options are for group buffer pools only. This specifies what table spaces are written to the group buffer pool in a data sharing environment.

  9. Select whether to compress data in the rows or not.

  10. Optional: Select the check box to decide whether DB2 tracks modified pages in the space map pages of the table space or partition. If you choose to let DB2 track changes, you could see some improvement in the performance of incremental image copies. If you clear the check box, DB2 uses the LRSN value in each page to determine whether a page has been changed. This should not be used for a LOB table space.

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Managing your partitions (for partitioned table spaces only)

This page of the notebook gives you a table of information about each partition you define in the table space. The table has a default set of parameters for each of the partitions when it is first opened. The number of partitions displayed corresponds to the number of partitions defined on the Table Space notebook page.
  1. Click the CHANGE button to modify the properties of a partition you have selected from the table. This opens the Change Partition Management dialog.

  2. Click the Reset button to revert the properties of the selected partitions back to the state at the time you opened this window.

  3. Click the Move Up button to reorder the partitions within the table. For every click of this button, the partition is moved up, and the corresponding partition number is changed.

  4. Click the Move Down button to reorder the partitions within the table. For every click of this button, the partition is moved down, and the corresponding partition number is changed.

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