When the coupling facility space for a log stream becomes full

This information applies to coupling facility log streams only.

Ordinarily, system logger offloads coupling facility resident log stream data to DASD log data sets before the coupling facility storage allocated to the log stream is fully utilized. Occasionally however, the coupling facility storage allocated to a log stream reaches 100% utilization, for reasons such as a sudden burst of logging activity or because your coupling facility is sized too small for the volume of log data.

Applications are notified of a filled log stream by system logger service return code of X'08' and a reason code of IXGRsnCodeCFLogStreamStorFull (X'0860'). System logger will not accept write requests until offload processing can be completed and applications receive an ENF signal with bit IXGENFStructureNotFull on.