Hey all,
In one of our 19.6 EE instances (OL7.7 VM), the PSP0 background process
occasionally goes into a CPU wait state for an extended time (>1 hour).
This shows up both in real-time monitoring with EM13.4 as well as AWR
reports as event "CPU + Wait for CPU". However, there is no correlated CPU
usage from the OS side. There are several "rdbms ipc message" idle waits
reported on this process.
There are no trace files generated, there are no entries in the alert log
and nothing about this that I could find in MOS. Other than EM/AWR saying
that PSP0 is waiting, I don't see any negative effects of this event.
Thoughts, anyone? I guess I'm wondering "If it ain't broke..." applies or
is this a precursor/omen of fun things to come. Or is this another case of
an idle wait being treated as non-idle in reporting?
Thanks,
Rich
