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      10.13.3 Measuring Performance with performance_schema
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  <p>
   You can query the tables in the
   <code class="literal">
    performance_schema
   </code>
   database to see real-time
        information about the performance characteristics of your server
        and the applications it is running. See
   <a class="xref" href="performance-schema.html" title="Chapter 29 MySQL Performance Schema">
    Chapter 29,
    <i>
     MySQL Performance Schema
    </i>
   </a>
   for details.
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