Add system properties

Add or create a system property to control system behavior.

Some properties in the system are not visible in an instance by default and must be added to the System Property [sys_properties] table. You can add a system property if a feature requires the addition of the property.

Important: System properties store configuration information that rarely or never changes. Each time you change or add a system property, the system flushes the cache to keep all nodes in the cluster in synch. This cache flush has a very high performance cost for one to ten minutes, which can potentially cause an outage if done excessively. To prevent such outages, do not use a system property to store configuration information that changes more than once or twice a month. Instead, use a custom table to store regularly changing configuration information.