RMS_DFMBFIDX

   RMS_DFMBFIDX establishes the default RMS multibuffer count for
   indexed sequential disk operations. This value defines the number
   of I/O buffers that RMS allocates for each indexed file. For
   sequential access, a larger number that allows some of the index
   buckets to remain in memory can improve performance.

   You can set this system parameter with the DCL command
   SET RMS_DEFAULT/SYSTEM and display the parameter with SHOW RMS_
   DEFAULT.

   RMS_DFMBFIDX is an AUTOGEN and DYNAMIC parameter.