title: Postgres SIGKILL crash
body: <p>FYI only; this does not need an answer.</p>
  
  <p>I was working on a Postgres server under heavy load, and issued a GRANT command that hung. It was not blocked by any other commands.
  I had a few open connections and was able to kill several of the processes with a normal pg_cancel_backend (SIGTERM) command, but my GRANT command didn't respond to either that or pg_terminate_backend (SIGINT). I finally tried "kill -9 (pid)" (SIGKILL) and the server crashed.</p>
  
  <p>Issuing SIGKILL to the database server process or the postmaster can cause crashes--that's well documented. Running SIGKILL against a child process can <b>also</b> crash the database.</p>