| 摘要 |
PURPOSE:To prevent exhaustion of an input/output backup pool by shifting the data set under an output holding state to a page enable save area from a system common area in case a circuit control program is slowed down. CONSTITUTION:A buffer save processing function part 29 of a communication access method program VTAM identifies the slow-down state of a circuit control program NCP-I and shifts the data put under a transmission holding state to a buffer save area 28 in a VTAM space 21 from an input/output buffer of a system common area 24. Then the input/output buffer is sent back to an input/ output buffer pool 25 for the second use. The data on the area 28 is subject to paging. When the slow-down state of the NCP-I is released, the page of the area 28 is fixed to a main memory to be set in an access enable state immediately. Then the data on the area 28 is sent directly to the NCP-I. |
