POOLCHECK

   This special parameter is use by VSI and is subject to change. Do
   not change this parameter unless VSI recommends that you do so.

   POOLCHECK is used to investigate frequent and inexplicable
   failures in a system. When POOLCHECK is enabled, pool-checking
   routines execute whenever pool is deallocated or allocated.

   Two loadable forms of SYSTEM_PRIMITIVES.EXE are available at
   boot time. The default image, which contains no pool-checking
   code and no statistics maintenance, is loaded when POOLCHECK
   is set to zero. When POOLCHECK is set to a nonzero value, the
   monitoring version of SYSTEM_PRIMITIVES.EXE, which contains both
   pool-checking code and statistics maintenance, is loaded.

   Setting the SYSTEM_CHECK parameter to 1 has the effect of setting
   POOLCHECK to %X616400FF. For further information about pool
   checking, see the OpenVMS VAX Device Support Manual, (which is
   archived).

   POOLCHECK is a DYNAMIC parameter. However, for a change in its
   value to have any effect, POOLCHECK must be non-0 at boot time
   (to load the monitoring version of SYSTEM_PRIMITIVES.EXE).