 without units, it is taken as kilobytes.  This
        parameter can be set at any time.  It can be overridden for
        <a class="xref" href="sql-vacuum.html" title="VACUUM"><span class="refentrytitle">VACUUM</span></a> and <a class="xref" href="sql-analyze.html" title="ANALYZE"><span class="refentrytitle">ANALYZE</span></a>
        when passing the <code class="option">BUFFER_USAGE_LIMIT</code> option.  Higher
        settings can allow <code class="command">VACUUM</code> and
        <code class="comma