We have encountered some weird problem last week and discovered that
the total MVS CPU busy percentage reported by both RMF and TMON were
inaccurate. RMF and TMON reported MVS CPU percentage does not match
with the total CPU% usage by the jobs running in the system at least
in one LPAR, the other LPAR seems to be fine. For example the reported
total CPU% was 72% at an interval period but only 40% when we add up
all the CPU% of jobs, a disparity of 30%. From the WLM activity
report, by comparing it with the total APPL% used divided by the total
assigned CPs also produced result of 40+%. Hence, the MVS CPU
percentage should have been 40+%. Anyone out there have encountered
this problem before? Any reported fix to resolve this problem? Btw, we
are still at z/OS v1.4, running in the sysplex.
Regards,
Jason
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