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    <div>
     <h3 class="title">
      <a name="performance-schema-lock-tables">
      </a>
      29.12.13 Performance Schema Lock Tables
     </h3>
    </div>
   </div>
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  <div class="toc">
   <dl class="toc">
    <dt>
     <span class="section">
      <a href="performance-schema-data-locks-table.html">
       29.12.13.1 The data_locks Table
      </a>
     </span>
    </dt>
    <dt>
     <span class="section">
      <a href="performance-schema-data-lock-waits-table.html">
       29.12.13.2 The data_lock_waits Table
      </a>
     </span>
    </dt>
    <dt>
     <span class="section">
      <a href="performance-schema-metadata-locks-table.html">
       29.12.13.3 The metadata_locks Table
      </a>
     </span>
    </dt>
    <dt>
     <span class="section">
      <a href="performance-schema-table-handles-table.html">
       29.12.13.4 The table_handles Table
      </a>
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    </dt>
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  <p>
   The Performance Schema exposes lock information through these
        tables:
  </p>
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    <li class="listitem">
     <p>
      <a class="link" href="performance-schema-data-locks-table.html" title="29.12.13.1 The data_locks Table">
       <code class="literal">
        data_locks
       </code>
      </a>
      : Data locks held and
            requested
     </p>
    </li>
    <li class="listitem">
     <p>
      <a class="link" href="performance-schema-data-lock-waits-table.html" title="29.12.13.2 The data_lock_waits Table">
       <code class="literal">
        data_lock_waits
       </code>
      </a>
      : Relationships
            between data lock owners and data lock requestors blocked by
            those owners
     </p>
    </li>
    <li class="listitem">
     <p>
      <a class="link" href="performance-schema-metadata-locks-table.html" title="29.12.13.3 The metadata_locks Table">
       <code class="literal">
        metadata_locks
       </code>
      </a>
      : Metadata locks
            held and requested
     </p>
    </li>
    <li class="listitem">
     <p>
      <a class="link" href="performance-schema-table-handles-table.html" title="29.12.13.4 The table_handles Table">
       <code class="literal">
        table_handles
       </code>
      </a>
      : Table locks held
            and requested
     </p>
    </li>
   </ul>
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  <p>
   The following sections describe these tables in more detail.
  </p>
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