CXXMAINT (Maintain Directory) › CXXMAINT ALTER CXXENQ (Controlling ENQ)

CXXMAINT ALTER CXXENQ (Controlling ENQ)

When running with the Simplify option, an executing MUF protects the CXX during the enable process and maintains it for the entire execution. This ability to provide one protection process is part of the performance benefits of the option. If the MUF is not enabled, DBUTLTY executions use Simplify protections and also the normal not-Simplify protections described in the information that follows.

When not running with the Simplify option or when the MUF is not enabled, locking the Directory (CXX) is done during all CXX control functions. The CXXMAINT ALTER CXXENQ option is part of the process of locking the CXX.