1 – CHECKS
    Validates all parameter values to ensure that they fall within
    the defined minimum and maximum values.
    Because range checks are enabled by default, use PARAMETERS
    ENABLE CHECKS after entering a PARAMETERS DISABLE CHECKS command.
    Format
      PARAMETERS ENABLE CHECKS
1.1 – Example
  SYSMAN> PARAMETERS DISABLE CHECKS
  SYSMAN> PARAMETERS SET WSMAX 20
  SYSMAN> PARAMETERS ENABLE CHECKS
  SYSMAN> PARAMETERS SET WSMAX 30
  %SMI-E-OUTRANGE, parameter is out of range
  SYSMAN> PARAMETERS SHOW WSMAX
  Parameter Name    Current  Default  Minimum  Maximum Unit  Dynamic
  WSMAX                2000     1024       60   6400 pages
      The PARAMETERS ENABLE CHECKS command in this example shows
      that when range checking is disabled, the system accepts a
      working set value (WSMAX) of 20. However, once range checking
      is enabled with the PARAMETERS ENABLE CHECKS command, the
      system does not accept a WSMAX below the minimum, which is
      60.