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