John,
Take a look at APAR OW55297 on IBMLINK. It has a high-level description of
what you're
seeing on the Page Datasets. It also has references to other manuals.
I printed the 1st block for a couple of my Page Datasets ( they were
formatted by a z/OS R4
system and are being used by active z/OS R4 systems ) and the information
seems to
match what you identified. Based on my systems, the 3 STCK values seem to
represent:
+16 = TOD Clock when the Define Pagespace command was executed ( not sure
if its started or ended ).
+24 = TOD Clock when the Pagespace was accessed ( maybe when ASM was
initialized at IPL time? ).
+32 = TOD Clock when the 'status update' was performed
The timestamp at +24 looks odd to me because all my Page Datasets for any
one z/OS
image have the same value. The timestamp seems to be within a .1 seconds
of the message
you get at IPL:
IEA940I THE FOLLOWING PAGE DATA SETS ARE IN USE:
PLPA ........... - HLQ1.PLPA
COMMON ......... - HLQ1.COMMON
LOCAL .......... - HLQ1.LOCAL
The timestamp at +32 appears to change every 5 minutes on one of my sandbox
z/OS R4
systems. I haven't had time to check another system that would be more
active than my
sandbox system.
HTH
Glenn Miller
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