Prevent priority aging

Some operating systems lower the priority of long-running processes as they accumulate processing time, a feature of the operating system known as priority aging.

Priority aging can cause the performance of database server processes to decline over time. In some cases, however, you can use the operating system to disable this feature and keep long-running processes running at a high priority.

To determine if priority aging is available on your computer, check the machine notes file that comes with your installation and is described in the Introduction to this guide.

If you can disable priority aging through the operating system, you can disable it by specifying noage for the priority entry in the VPCLASS configuration parameter. For more information, see the HCL Informix® Administrator's Reference.

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