31-bit storage option

Data Optimizer can relocate non-VSAM QSAM buffers to 31-bit storage. The SAM31 keyword enables relocating the buffer pool.

For a program to be eligible for buffer pool relocation, the following conditions must exist:

  • When opening the file, the program must be in 31-bit addressing mode (AMODE31).
  • The access method must be QSAM.
Warning

Some programs might switch to 24-bit addressing mode when reading or writing data. Performing I/O in 24-bit address mode causes an abend when SAM31 is in use.

Parameter

Description

Values

The possible values are:

  • SAM31 allows relocation of the buffer pool.
  • NOSAM31disallows relocation of the buffer pool.

Default value

NOSAM31

DD overrides

  • // DAP@SAMX

    This statement enables SAM31 and allows for the relocation of the buffer pool.

  • //DAP@NSMX

    This statement enables NOSAM31 and disallows the relocation of the buffer pool.

Data policy keywords

SAM31, NOSAM31

Related topic

 Resource-Utilization-options


 

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