To minimize the chance of such a problem, avoid temporarily stopping more than one system at a time when you are using ring acceleration. See Operating the ring complex for additional information about operating a global resource serialization complex.

To use ring acceleration, specify ACCELSYS on all systems. ACCELSYS(2) provides the maximum performance benefits. Global resource serialization rejects an ACCELSYS value that is less than 2 or greater than 99. Specifying a value greater than the number of systems in the complex turns ring acceleration off. The default is ACCELSYS(99), which turns ring acceleration off.

Specifying a different ACCELSYS value for different systems in a complex is allowed, but the system uses the highest ACCELSYS value specified to determine when to send the shoulder-tap acknowledgment. If the highest value is greater than the number of systems in the ring, the shoulder-tap acknowledgment does not take place. To ensure that shoulder-tap processing occurs, specify ACCELSYS(n) on all systems in the ring, making sure that the value of n is less then the number of systems in the ring.