Setting Database Server Shared-Memory Configuration Parameters

Shared-memory configuration parameters fall into the following categories based on their purposes:

• Parameters that affect the resident portion of shared memory
• Parameters that affect the virtual portion of shared memory
• Parameters that affect performance

You can set shared-memory configuration parameters using a text editor. You must be root or user informix.

Before any changes that you make to the configuration parameters take effect, you must reinitialize shared memory by stopping and starting the database server.

You can also tune certain shared-memory configuration parameters using the onutil SET command. Changes made with this utility do not require a server restart, but instead take effect immediately.