Altering performance parameters for an existing table space

Use the Advanced window that is available from the alter window to change performance parameters for an existing table space or table space partition.

Fields and controls

Authorities and privileges

To change performance parameters for a table space or table space partition:

1. Open the alter window:
   • Open the Alter Table Space window.
   • Open the Alter Table Space Partition window.
2. Click on the Advanced push button. The Advanced window opens.
3. You can do one or more of the following tasks:
   • The Page size field shows the size of the pages to be used for the table space. The valid values are 4KB, 8KB, 16KB and 32KB. You cannot alter the page size.
   • In the Prefetch size field, specify the number of pages to be read from the table space or table space partition when data prefetching is being performed.
   • In the Overhead field, specify the number of milliseconds you want to use during query optimization as the amount of I/O controller overhead.
   • In the Transfer field, specify the number of milliseconds to be used to read one page into memory.
   • In the Buffer pool field, specify the name of the buffer pool that this table space or table space partition should reside in.
4. Click on the OK push button to return to the alter window.