title: Unable to create pg_stat_statements view in Postgresql 9.4
body: <p>I'm unable to create <code>pg_stat_statements</code> view in Postgresql 9.4 on Windows Server.</p>
  
  <p>I want to view this table so as to get the top running queries on my Postgresql database.</p>
  
  <p>For this I enabled:
  <code>shared_preload_libraries = 'pg_stat_statements'</code>
  in my Postgresql.conf file. As this update requires a restart, as soon as I restarted my postgresql service on Windows, I got an unable to restart error.</p>
  
  <p>I can see this particular message in my event log viewer:</p>
  
  <blockquote>
    <p>"FATAL:  could not access file "pg_stat_statements": No such file or directory"</p>
  </blockquote>
  
  <p>How can I create the <code>pg_stat_statements</code> view?</p>