If you experience long DFSMSrmm command response time when DFSMSrmm is performing a search, check the MAXHOLD operand in PARMLIB member EDGRMMxx. The MAXHOLD operand defines the number of records the subsystem scans while holding a reserve on the DFSMSrmm control data set.

Recommendation: Use the default MAXHOLD value described in z/OS DFSMSrmm Implementation and Customization Guide.

It might take DFSMSrmm longer to respond when you issue DFSMSrmm subcommands if DFSMSrmm inventory management is in process, or if the DFSMSrmm control data set is being backed up. You can minimize impact on your users by scheduling inventory management processing during non-peak hours.