Shared memory and semaphore kernel parameters

The shared memory and semaphore kernel parameters on the database server must have at least the minimum values shown. You might need to increase them if there are more than 20 users per database server. The values shown are values Informix® uses for testing the port to each platform. Because the optimal values depend on your hardware, network configuration, software, and workload, ask your system administrator for assistance.
Note: The ipcs command displays the current shared memory that is in use. This command can help you debug shared memory problems.

When adding many more users to a database or creating a server, you might need to increase the shared memory and semaphore kernel parameter values.

Note: Before changing the kernel parameters, be sure to perform a complete backup of the system (for example, save a copy of the kernel).

For supported versions of the operating systems listed in this Information Center, see the Rational® Synergy Readme.


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