We have a few Hosted Map Image services, for certain things that require more advanced symbology.
Once in a blue moon, we see a sudden, massive spike in our ArcGIS Server machine's CPU use. When we check the server logs after the fact, we tend to see a series of "SEVERE" level messages from both the hosted map image service and System/DynamicMappingHost.MapServer with a variety of errors.
I can't confirm that these things are linked, but I am working with the assumption that they are.
My question: has anyone else seen this happen related to Hosted Map Image layers? We're on 10.9.1, but saw similar behavior on other versions.