RMS_DFMBFSDK

   RMS_DFMBFSDK establishes the default RMS multibuffer count for
   sequential disk operations. This value defines the number of I/O
   buffers that RMS allocates for sequential disk files.

   The default value is usually adequate. However, if read-ahead
   or write-behind operations are used, a larger number improves
   performance.

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

   RMS_DFMBFSDK is an AUTOGEN and DYNAMIC parameter.