Storage requirements for page data sets

ASM allocates storage in extended system queue area (ESQA) for every page data set that is in use. For data sets that are defined during IPL, this storage is obtained during IPL. For data sets that are added dynamically after IPL, this storage is obtained during the processing of the PAGEADD command.

Regardless of the page data set size, the ESQA consists of the following:
  • A fixed amount of bytes (approximately 32,000 bytes)
  • A variable amount that is determined by the size of the data set (24 bytes for each cylinder)
Parent topic: Auxiliary storage management initialization