I can confirm deleting the blobs file did not speed up, or make the Recommended pages load any quicker, and I am still swamped with slow queries, and there is nobody watching right now.
Ignore the ‘unknown metadata type’ error messages.
Engineering is moving things around and that’s one of the leftovers they will be cleaning up. It’s harmless.
At this point, your only recourse is to stand up a new test server with a different name (to avoid collision).
If that doesn’t help then it must be your OS or hardware.
Media doesn’t matter whereas PMS APP_SUPP_DIR does.
PMS needs the file system locks which aren’t guaranteed when running network or other merged file systems.