DB2 Server for VM: System Administration

Appendix A. Virtual and Real Storage Requirements

This appendix offers guidelines for estimating the resources needed for the database manager.

For a system operating in multiple-user mode and processing both preplanned and dynamic requests, adequate performance requires:

• Approximately 3MB to 4MB of real storage for a database virtual machine and its buffers. Sufficient real storage must be made available such that there is as little paging of the database machine virtual storage as possible. The corresponding virtual storage is 8MB for the base code, or the base code and DSS code; 10MB for DRDA code.
• Approximately 30KB to 100KB of real storage for a user machine running DB2 Server for VM preplanned applications, the preprocessors, the DBS utility, or ISQL. The corresponding virtual storage requirement is about 6 megabytes.