title: Danger in killing autovacuum: VACUUM queries (to prevent wraparound)
body: <p>There is an autovacuum query that is taking a very long time to run, and preventing alter queries to run.</p>
  
  <p>What is the danger is killing this autovacuum process before it's done?</p>
  
  <pre>
  PID      QUERY
  16967 | autovacuum: VACUUM public.articles (to prevent wraparound)
  </pre>
  
  <p>Here is how I am killing it:</p>
  
  <pre><code>select pg_terminate_backend(16967) from pg_stat_activity;
  </code></pre>