(Linux only)

(RHEL 7 and SLES 12) systemD is a system and service manager for Linux operating systems. With systemD one of the improvements is that applications can be started as a unit service.

With UseSystemD attribute enabled in RHEL 7 or SLES 12, the Oracle resource comes online as a unit service in system.slice during application start. Without the UseSystemD attribute enabled, a typical online entry point starts the resource in user.slice. Starting the application unit service in system.slice avoids the possibility of an Oracle database crash. Further, configure application - specific environments by assigning key-value pairs to the SystemAttrDList attribute.