The NBA/FPB limit and sync point in a DBCTL environment

In BMP regions and CCTL threads, when the NBA/FPB limit is reached, an 'FW' status code is returned. This status code is presented to every subsequent Fast Path database call until the OBA/FPOB limit condition is reached.

The first occurrence of the 'FW' status code indicates no more NBA/FPB buffers exist. This occurrence is a convenient point at which to request a sync point. Fast Path resources (and others) would be released and the next sync point interval would be authorized to use a new set of NBA/FPB buffers. The overflow buffer latch serializes all the regions in an overflow buffer state and therefore causes delays in their processing.