title: Mysql 5.7 Table 'performance_schema.metadata_locks' doesn't exist
body: <p>I faced metadata lock problem and found nice solution: </p>
  
  <p><a href="http://mysql.wisborg.dk/2014/01/13/who-holds-the-metadata-lock-mysql-5-7-3-brings-help/" rel="nofollow">http://mysql.wisborg.dk/2014/01/13/who-holds-the-metadata-lock-mysql-5-7-3-brings-help/</a></p>
  
  <p>I did:</p>
  
  <pre><code>UPDATE setup_consumers SET ENABLED = 'YES' WHERE NAME = 'global_instrumentation';
  </code></pre>
  
  <p>and:</p>
  
  <pre><code>UPDATE setup_instruments SET ENABLED = 'YES' WHERE NAME = 'wait/lock/metadata/sql/mdl';
  </code></pre>
  
  <p>But unfortunately I can't see table named "metadata_locks" in my "performance_schema" DB...</p>
  
  <p>What I'm doing wrong?</p>