WebSphere Application Server Version 6.1 Feature Pack for Web Services
             Operating Systems: i5/OS

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This topic applies only on the i5/OS operating system.

DB2 Universal Database performance tips

You can easily adjust your system QSQSRVR prestart job settings to optimize the process of acquiring connections from DB2 Universal Database for i5/OS.

On the i5/OS platform, QSQSRVR jobs process Java Database Connectivity (JDBC) tasks. By default, five QSQSRVR jobs are initially active. When fewer than two QSQSRVR jobs are unused, the i5/OS system creates two more jobs. If you increase the active job values, an application that establishes a large number of database connections over a short period of time might create connections more quickly. Increase the values for the initial number of jobs, threshold, and additional number of jobs by running this command on an i5/OS command line:
CHGPJE SBSD(QSYS/QSYSWRK) PGM(QSYS/QSQSRVR)
Do not start more QSQSRVR jobs than your application requires. Active QSQSRVR jobs require some overhead, even if these jobs are not used.



Related tasks
Tuning the application serving environment
Related information
IBM i5/OS Information Center: Monitor and tune database performance
i5/OS Performance Management Resource Library
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Last updated: Nov 25, 2008 2:35:59 AM CST
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