Oracle Enterprise Manager is a perpetual well of joy!
The warning sign in Performance Hub is harmless, but easy to solve (even without OEM activities - simple sql scripts are enough)

https://berxblog.blogspot.com/2023/01/oem-ash-package-version-status-manual.html

I had some fun with OEM adding cman targets.
At least for me it wasn't as documented as I'd would have preferred.
(so it's more a note-to-self than anything of public interest)

https://berxblog.blogspot.com/2022/12/oem-135-add-cman-target.html
https://berxblog.blogspot.com/2022/12/oem-135-add-cman-target-with-emcli.html

Things I like:
A SW vendor putting huge effort into a tool to collect & diagnose issues on the system - for faster and more systematic problem analysis.
Things I dislike:
The same vendor limiting this feature to a subset of systems - preferring only their own "hard&software - desinged to fail together" for no reasons.

https://support.oracle.com/epmos/faces/SearchDocDisplay?_adf.ctrl-state=14xanejzk0_4&_afrLoop=223083284264014#newfeature1
#Oracle #AHF #insights #Exadata

There is no silver bullet in performance tuning at all. Just a simple focus on top resource consumers. Of course basic knowledge about the system helps, as well as minimal skills in using a search engine.

https://berxblog.blogspot.com/2022/12/from-200-active-sessions-down-to-2-no.html?s=m