On 4/11/2017 1:46 PM, Jesse 1 Robinson wrote:
Part of the problem, I learned some time back at SHARE, is that there is no mechanism to 'reclaim' page slots that no longer need to remain on disk. Once storage gets paged out, it sits there like a sandbag until the owning task is stopped. Contrast that with JES2 spool track reclaim, which constantly munches through spool like Pacman and frees up unneeded space.
Many moons ago code was implemented in ASM and RSM to slowly reclaim ASM page slots for virtual pages that were changed in real storage. I have vague memories of this functionality later being disabled for some technical concern, but can't remember what it was.
Regards, Greg ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
