January 2005
Beginner to intermediate
928 pages
22h 14m
English
book
Understanding DB2®: Learning Visually with Examples
by Raul F. Chong, Clara Liu, Sylvia F. Qi, Dwaine R. Snow
Content preview from Understanding DB2®: Learning Visually with Examples
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16.2. System/Server Configuration
The three commandments in designing your database server are
Ensure there is enough memory available.
Ensure there are enough physical disks to handle the I/O requirements.
Ensure there are enough CPUs to handle the workload.
16.2.1. Ensuring There Is Enough Memory Available
As discussed earlier in the book, all DB2 data and indexes are manipulated in the database buffer pools. The buffer pools are allocated in memory, so you need to ensure that you have enough real memory to hold the buffer pools that you have defined. If you have more buffer pool space defined than real memory, your system has to perform a lot of paging operations that have a very large negative affect on performance. While the buffer pools are ...
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