I have a 7.2.1 backend running VACUUM which appears to be blocking all other
processes. I have issued SIGTERM and SIGINT directly to that backend and
also killed the client process, but the VACUUM continues chewing up CPU and
blocking others. I know we need an upgrade; does anyone know how I can get
this VACUUM backend killed without taking down all the blocked/pending
UPDATEs and INSERTs?