IBM Tivoli Monitoring > Version 6.3 Fix Pack 2 > Installation Guides > Installation Guide > Performance tuning > Tivoli Data Warehouse > Relational database design and performance tuning for DB2 Database servers > Hardware design and operating system usage
IBM Tivoli Monitoring, Version 6.3 Fix Pack 2
Memory
Understanding how DB2 organizes memory helps you tune memory use for good performance. Many configuration parameters affect memory usage. Some parameters might affect memory on the server, some on the client, and some on the server and the client. Furthermore, memory is allocated and de-allocated at different times and from different areas of the system.
While the database server is running, you can increase or decrease the size of memory areas inside the database shared memory. Understand how memory is divided among the different heaps before you tune to balance overall memory usage on the entire system. See the DB2 Administration Guide: Performance for a detailed explanation of the DB2 memory model and all of the parameters that affect memory usage.
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Hardware design and operating system usage