Function

To modify information about the amount of space in the checkpoint.

Parameters

BERTNUM=bertnum

The number (200–1000000) of BERT (Block Extent Reuse Table) entries defined in the checkpoint. The lower limit when decreasing this value is based on the number of JOEs and JQEs defined on the system. In addition, you cannot decrease it below the number of BERTs that are in use. For example, if BERT 23176 is the highest BERT in use, then 23177 is the lowest you can reduce BERTNUM to. This is true even if 23175 is not currently in use. Likewise, you cannot increase the BERTNUM parameter to a value below the number of BERTs that are defined on the system. You must specify a BERTNUM value that is between the system-calculated minimum and the system-defined maximum. Specifying a value that is too low will result in a HASP003 message with the lowest valid value displayed.

Note: Use this parameter to increase the limit for the JNUM resource that is reported on the HASP050 message.

BERTWARN=bertwarn

The threshold of BERT utilization at which the $HASP050 message should be issued. The valid range is 1 to 100.

Authority Required

This command requires system authority. The description of the $T RDRnn command explains how to ensure that the authority of the appropriate MVS™ system command group is assigned.

This command requires control security access authority. For a description of assigning command input authority, see z/OS JES2 Initialization and Tuning Guide.

Scope

MAS-wide. The command has an effect across the entire MAS.

Messages

The $HASP852 message displays the current values of all the parameters on the CKPTSPACE initialization statement.