On 4/11/2017 2:46 PM, Jesse 1 Robinson wrote:
The problem we face is 'paging creep'. Right after IPL, systems show 0% ASM
usage for some period of time. Then usage starts to creep up until we get
warnings, then eventually hit the no-more-SVC-dumps condition. Adding memory to
an LPAR slows the creep but cannot seem to stop it altogether. The problem is
most pronounced on systems with large DB2 apps.
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.
.
.
J.O.Skip Robinson
Southern California Edison Company
Electric Dragon Team Paddler
SHARE MVS Program Co-Manager
323-715-0595 Mobile
626-543-6132 Office ⇐=== NEW
[email protected]
Preach it Brother Skip!! After IPL, I'm at 0%. A week in, 15%, a month
in, 44%. If this is indeed a "feature", then we need to create a
requirement to fix this.
Tom
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