BPC64 - Buffer Pool Cache Storage Type

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# BPC64 - Buffer Pool Cache Storage Type

This Natural profile parameter specifies the type of storage for the buffer pool cache of a local Natural buffer pool.

Possible settings | `ON` | This indicates that virtual storage above the 2 GB line is to be used for the buffer pool cache.
`OFF` | This indicates that a data space is to be used for the buffer pool cache.
Default setting | `OFF` |
Dynamic specification | yes | This parameter can only be specified dynamically.
Specification within session | no |

Notes:

1. This Natural profile parameter is applicable under z/OS only (not for Com-plete).
2. It corresponds to the `C64` subparameter of the `BPI` profile parameter or `NTBPI` macro.
3. Internally, the `BPC64` specification is converted into the equivalent `BPI` specification; for example: `BPC64=ON` is converted into `BPI=(TYPE=NAT,SEQ=0,C64=ON)`.
4. The `BPC64` parameter only applies to the primary Natural buffer pool (`TYPE``=NAT`, `SEQ``=0`). In the case of a global buffer pool, it is ignored. If there is a primary buffer pool with `SEQ=0` in the Natural parameter module, only the C64 setting of this buffer pool is updated.
5. In multi-user environments (for example, under CICS), the `BPC64` profile parameter only affects the very first Natural session which initializes the local buffer pool.
6. For general information on the Natural Buffer Pool, see Natural Buffer Pool in the Operations documentation.