<div id="docs-body">
 <div class="section">
  <div class="titlepage">
   <div>
    <div>
     <h4 class="title">
      <a name="shared-key-cache">
      </a>
      10.10.2.1 Shared Key Cache Access
     </h4>
    </div>
   </div>
  </div>
  <p>
   Threads can access key cache buffers simultaneously, subject
          to the following conditions:
  </p>
  <div class="itemizedlist">
   <ul class="itemizedlist" style="list-style-type: disc; ">
    <li class="listitem">
     <p>
      A buffer that is not being updated can be accessed by
              multiple sessions.
     </p>
    </li>
    <li class="listitem">
     <p>
      A buffer that is being updated causes sessions that need
              to use it to wait until the update is complete.
     </p>
    </li>
    <li class="listitem">
     <p>
      Multiple sessions can initiate requests that result in
              cache block replacements, as long as they do not interfere
              with each other (that is, as long as they need different
              index blocks, and thus cause different cache blocks to be
              replaced).
     </p>
    </li>
   </ul>
  </div>
  <p>
   Shared access to the key cache enables the server to improve
          throughput significantly.
  </p>
 </div>
 <br/>
</div>
