OS/390 Real Storage Management: Paging Still Matters - (PPT)

摘要

Paging is an essential mechanism in OS/390 - the paging you get is the paging you allow. Normally, it is of minor impact, but when it's bad, it's horrid. It will probably get worse in the long run, even in the 64-bit world. Anticipate paging disasters. Size AUX space to avoid punishment by the operating system. Increase size by 4X to maintain efficient blocked data transfer. Provide enough paths to keep disaster page-in time acceptable. Exploit new I/O subsystems to gain benefits of new ways to increase parallelism and reduce delays-maybe a need for a requirement? There is no magic bullet-you are free to court failure or to avoid "paging problems"-it's up to you.