November 2001
Intermediate to advanced
158 pages
5h 10m
English
Content preview from IBM ESS and IBM DB2 UDB Working Together
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40 IBM ESS and IBM DB2 UDB Working Together
One component of the database manager is called Buffer Pool Services (BPS). The BPS is
responsible for reading data and index pages from disk into memory and writing pages from
memory to disk. BPS will use the File Storage Manager or the Raw Storage Manager to get
the pages depending on whether an SMS or DMS table space is used. When creating a buffer
pool, by default, the page size is 4 KB, but you can choose to have the page size set at one of
these values: 4 KB, 8KB, 16 KB, or 32 KB. If buffer pools are created using one page size,
then only table spaces created using the identical page size can be associated with them. You
cannot alter the page size of the buffer pool following its creation. ...
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