class="bold"><strong>ncache</strong></span>.
    </p>
      <p>
         Because databases opened within Berkeley DB environments use the cache
         specified to the environment, it is an error to attempt to set a cache
         in a database created within an environment.
    </p>
      <p>
             The <code class="methodname">Db::set_cachesize()</code> method may not be called after the 
             <a class="xref" href="dbopen.html" title="Db::open()">Db::open()</a>  method is called.
    </p>
