Normal buffer allocation (NBA)

Fast Path regions and IMS regions accessing Fast Path resources require that the number of buffers to be allocated as normal buffers be specified in the region startup procedure by using the NBA startup parameter.

Because buffers allocated as normal buffers are used first, the number of normal buffers allocated must accommodate most of the transaction requirements.

The number of buffers a transaction or a sync interval is allowed to use must be specified for each region if Fast Path resources are likely to be accessed.

The combined value of the NBA and OBA parameters define the maximum number of buffers that IMS can allocate to the region.

If you use the Fast Path 64-bit buffer manager, the number of normal buffers specified by the NBA parameter are page fixed in the Fast Path buffer pool when the buffers are allocated. If you do not use the Fast Path 64-bit buffer manager, the number of normal buffers specified by the NBA parameter are page fixed in the Fast Path buffer pool at the start of the region.