doc.FAQ.HowCanIPreventStabilityProblems Use the following guidelines to prevent stability problems:Patch databases and operating systems regularly. Contact database and o/s vendors to see if patches are associated with problems. Ensure Unix kernel tuning parameters match parameters specified by database and o/s documentation. Ensure your machine has adequate memory and processor resources. Comparison test Multi-Tier drivers when Single-Tier drivers appear to expose limitations in a database native client. Re-link Multi-Tier database agents against databases, especially patched databases. Ensure PortHigh is set in the [Protocol TCP] section of the Multi-Tier Session Rules Book. This is the oplrqb.ini file that resides in the /bin sub-directory of the server components installation. Multi-Tier users perform the following test: login to the machine that contains the OpenLink server components. Run oplshut -s on the command-line. Compare the output to the Windows (Task Manager) or Unix (ps -ef.) Upgrade server components if oplshut shows fewer processes when compared to the Task Manager or ps. Multi-Tier users experiment with database agent reuse. Users should comparison test the following values: ifsame process, upto 5 ifsame application, upto 5 ifsame database, upto 5