Background process PSP0 high CPU waits
Date: Wed, 3 Feb 2021 11:58:02 -0600
Message-ID: <CAANsBX3VRF+VR8s07S8FhDXfKv-kJ6zuRbUgcJ-0TwJE-+F5BQ_at_mail.gmail.com>
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
-- http://www.freelists.org/webpage/oracle-lReceived on Wed Feb 03 2021 - 18:58:02 CET