BPSIZE - Size of Natural Local Buffer Pool

This Natural profile parameter specifies the size of the Natural local buffer pool.

Possible settings 256 - 2097151 Size of the Natural local buffer pool in KB.
Default setting 256  
Dynamic specification yes This parameter can only be specified dynamically.
Specification within session no  


  1. This Natural profile parameter corresponds to the SIZE specification of the BPI profile parameter or the NTBPI macro.
  2. BPSIZE only applies to the primary Natural local buffer pool (TYPE=NAT, SEQ=0). For a global buffer pool, it is ignored. If there is a primary buffer pool with SEQ=0 in the Natural parameter module, only the SIZE setting of this buffer pool is updated.
  3. In multi-user environments (for example, under CICS), the BPSIZE parameter only affects the very first Natural session, which initializes the local buffer pool.
  4. Under Com-plete, the size of a local buffer pool is set as described in the corresponding Natural installation documentation.
  5. Under BS2000, the size of a local buffer pool is specified with the parameter SIZE of the ADDON macro.
  6. Internally, the BPSIZE specification is converted into an equivalent BPI specification; for example: BPSIZE=1500 is converted into BPI=(TYPE=NAT,SEQ=0,SIZE=1500).
  7. For general information, see Natural Buffer Pool in the Operations documentation.