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<?xml version="1.0" encoding="ISO-8859-1"?>
<refentry id="fn_dbf_set">
<refmeta>
<refentrytitle>__dbf_set</refentrytitle>
<refmiscinfo>admin</refmiscinfo>
</refmeta>
<refnamediv>
<refname>__dbf_set</refname>
<refpurpose>Sets vector execution parameters.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn___dbf_set">
<funcprototype id="fproto___dbf_set">
<funcdef><function>__dbf_set</function></funcdef>
<paramdef>in <parameter>flag_name</parameter> varchar</paramdef>
<paramdef>out<parameter>flag_value</parameter> any</paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc___dbf_set">
<title>Description</title>
<para>Sets at run time by a dba group user the vector execution parameters.</para>
</refsect1>
<refsect1 id="params___dbf_set">
<title>Parameters</title>
<refsect2><title>flag_name</title>
<para>Name of the flag.</para>
<para>For Configuring Vectored Execution, should be used the following values:</para>
<para>Note: Only effective with Virtuoso 7.0 and later.</para>
<itemizedlist mark="bullet">
<listitem><emphasis>dc_batch_sz</emphasis>: flag for ini parameter VectorSize;</listitem>
<listitem><emphasis>dc_max_batch_sz</emphasis>: flag for ini parameter MaxVectorSize;</listitem>
<listitem><emphasis>enable_dyn_batch_sz</emphasis>: flag for ini parameter AdjustVectorSize;</listitem>
<listitem><emphasis>enable_qp</emphasis>: flag for ini parameter ThreadsPerQuery;</listitem>
<listitem><emphasis>aq_max_threads</emphasis>: flag for ini parameter AsyncQueueMaxThreads;</listitem>
</itemizedlist>
</refsect2>
<refsect2><title>flag_value</title>
<para>Value of the flag.</para>
</refsect2>
</refsect1>
<refsect1 id="examples___dbf_set">
<title>Examples</title>
<example id="ex___dbf_set"><title></title>
<para>Set the maximum number of outstanding parallel work units to 16:</para>
<programlisting><![CDATA[
SQL> __dbf_set ('enable_qp', 16);
]]></programlisting>
</example>
</refsect1>
</refentry>
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