Upgrade Guide for DB2 UDB for z/OS > Tuning the Production Upgrade Scripts >
About Tuning the Upgrade Scripts
Upgrades: All upgrades. Environments: Production test environment only. Does not apply to production environment. In Release 7.8, you can tune the SQL upgrade scripts in a production test environment to improve their performance and then re-use these tested scripts in the live production environment. For example, the scripts used to upgrade your Siebel Database are generic. They update your Siebel Database to support all Siebel applications' functionality. You can reduce downtime by tuning these scripts to optimize performance by eliminating unneeded SQL statements. You can then re-use these revised scripts in your production upgrade. You can tune your production upgrade scripts at any time after upgrading the Siebel Database schema in your production test environment. Contacting Siebel Expert Services
CAUTION: You are required to contact Siebel Expert Services for approval of any upgrade script tuning that you perform. If you do not, you may invalidate your support agreement.
It is recommended (but not required) that you contact Siebel Expert Services for help with the following tasks:
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