Siebel Installation Guide for Microsoft Windows: Servers, Mobile Web Clients, Tools > Guidelines for Configuring the RDBMS > Creating DB2 UDB Database Objects >

Setting Up DB2 UDB Bufferpools

A bufferpool is an area of main system memory that is used for holding pages of data that have been fetched from the tablespace. In DB2 UDB, each tablespace is associated with a bufferpool. Adding more space to a bufferpool enhances the performance of the database.

You must have at least three bufferpools for the Siebel tablespaces. You can use the default bufferpool (called IBMDEFAULTBP) to buffer data pages from all the Siebel 4-KB tablespaces.

You must also create additional bufferpools with 16-KB and 32-KB page sizes for sorting and other SQL processing. A sample configuration is shown in Table 8.

Different operating systems support different maximum amounts of DB2 addressable memory. Depending on the memory configuration of a given server, the suggested pool sizes for IBMDEFAULTBP and BUF16K bufferpools may exceed these maximums, requiring you to allocate a smaller percentage. To determine optimal bufferpool sizes, use DB2 monitoring features.