Many of the other paramters are performance related. I would read Chapter 13. Configuring DB2, of the "Administration Guide: Performance."
Before manually changing any parameters, I would first use the Performance Configuration Wizard (using the Control Center GUI) to get a good starting point:
1. Expand the object tree until you see the Databases folder.
2. Right-click the instance or database you want to change, and select Configure
Performance Using Wizard from the pop-up menu.
3. Click on each page and change information as required.
4. Click on the Results page to review you work and apply any suggested
5. When you are finished applying updates, click Finish.
There is also a command line version of the wizard.
The most important performance consideration using the wizard is to know what percent of system memory you want to allocate to DB2. I would choose between 50% and 75% depending on how much memory you have and what other processes are running.
The wizard will get you off to a good start and you can fine tune from there once you learn more about the tuning parameters.