What is swap-in swap-out page-in page-out ?

Deepa.m · New User Joined: 28 Apr 2005 Posts: 99

MGIndaco · Posted: Fri Jun 10, 2005 8:56 pm

I don't know Page-in and Page-out but for swap I think that is the method to use more than two session ISPF. If you do START on command line you will open another session and so to swap from first second and third session ISPF you can only use the command SWAP: SWAP 1 SWAP 2 SWAP 3 and so on...
Can be this a reply to your question?

jalpan225 · Posted: Sun Apr 23, 2006 4:49 am

Page in - Page outs - They are similar in function to any other operating system. When a particular page is requested by the main memory, but it is not present in the main memory; a page fault occurs...and this page is "paged in" to the main memory. Similarlly pages that have been inactive for a while are "paged out" to page data sets on the auxillary memory.

Swap in - Swap out - This is very specific to MVS. MVS sometimes pages out all the pages of a particular address space which is no longer active to accomdate higher priority address spaces. This collective page out of all the pages of a particular address space is called swap out.

Hope this helps

prakash271082 · New User Joined: 09 Sep 2005 Posts: 53

Hi Jalpan,

Your explanation seems perfect and excellent ( upto the point ). Great work done.