100% CPU Usage - Portal for ArcGIS Server 10.7.1/10.8.1

[ScottMinter]

Installed portal for ArcGIS server 10.7.1 a month ago. No issues until noon today. At that point the CPU usage shot to 100% and has stayed that way.

ticket with Esri and worked on the issue all day. Still 100% cpu. Did a Repair on the software installation, rebuilt the portal index, updated database statistics...nothing has worked.

If the Portal service is stopped (windows) the cpu usage stops.

Nothing in the error logs seems out of place.

Anyone ever see anything like this or have ideas where to look? The highest percentage cpu usage seems to be java but it rotates and is not one process. 

[MaryGraceMcClellan]

@MarkGiesbrecht Thank you for sending that along! It sounds like we might be running too many services as well. I re-published all of our services from ArcGIS Pro so I could take advantage of the shared instances where possible, which did help! Unfortunately, I'm still running into the site crashing or coming close to crashing due to CPU usage about once a week, so maybe it is indeed time to look at resizing the servers. 

Thanks again!