If you use the QUIESCE command, the Db2 ECCR waits until it reaches a point in the Db2 log where no in-flight UOWs exist before shutting down. Use the QUIESCE command before performing a required cold start, for example, when migrating to a new Db2 version or upgrading PowerExchange. On a busy Db2 subsystem, quiesce processing might take a long time. To issue the QUIESCE command, use the following syntax:

Use the MVS STOP command to stop the Db2 ECCR immediately, even though in-flight UOWs might exist. To issue the STOP command, use the following syntax:

After you stop the ECCR, PowerExchange issues messages that report the ECCR starting RBA, the number of records sent to the PowerExchange Logger for z/OS, the RBA or LRSN of the last Db2 log record that the Db2 ECCR read, and the URID of the oldest open UOW at that location in the Db2 log.