To use system resources effectively under CICS, connect and disconnect functions are performed by CA Datacom CICS Services. The DBCSID macros specify how and when CICS Services connects to each MUF. All MUFs are disconnected during CICS Services shutdown. You can specify general exceptions through the DBCSID macro appended to the System Generation Options Table (DBCVTPR) or explicitly invoke connect or disconnect at anytime through online commands. In the DBCSID macros, you can specify that MUFs are to be connected only when their use is required or only when you enter an online command to request connect. If no DBCSID macro is coded, connect is done at PLT time. In z/VSE, there is no option other than PLT. DBCSID is not available in z/VSE because it is intended to be used in a Multi-MUF environment and Multi-MUF is not supported in z/VSE.
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