Specifies whether to permit increases in the maximum number of concurrent executions of utilities.
0:
Do not permit increases in the maximum number of concurrent executions of utilities. When 0 is specified, the HiRDB system determines a fixed maximum number of concurrent executions of utilities.
1:
Permit increases in the maximum number of concurrent executions of utilities. If 1 is specified, the maximum number of concurrent executions of utilities can be increased based on the value of the pd_max_users operand.
For details about the maximum number of concurrent executions of utilities that is determined by the value specified in this operand, see Maximum number of concurrently executable utilities in the manual HiRDB Version 9 Command Reference.
Specification guidelines
Specify 1 in the following cases:
If the maximum number of concurrent executions with 0 specified is insufficient
If the following formula applies: total back-end server count (1 for a HiRDB single server configuration) 2 concurrent number of executions for all utilities824
In addition, if both of the following conditions apply, specifying 1 in this operand can reduce the amount of shared memory used.
value of pd_max_users < 32
value of pd_max_users > maximum-number-of-concurrent-executions-of-utilities
If 1 is specified, the shared memory needed for utility execution is allocated dynamically during utility execution.
Effects on individual estimation formulas
If the value of the pd_utl_exec_mode operand is changed, the following estimation formulas are affected:
HiRDB Version 9 Installation and Design Guide:
Calculation of required memory under Estimating the memory size required for a HiRDB single server configuration
Formulas for shared memory used by a unit controller under Estimating the memory size required for a HiRDB single server configuration
Calculation of required memory under Estimating the memory size required for a HiRDB parallel server configuration
Formulas for shared memory used by a unit controller under Estimating the memory size required for a HiRDB parallel server configuration
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