</para>
       </tip>
      </listitem>
     </varlistentry>

     <varlistentry id="guc-cpu-tuple-cost" xreflabel="cpu_tuple_cost">
      <term><varname>cpu_tuple_cost</varname> (<type>floating point</type>)
      <indexterm>
       <primary><varname>cpu_tuple_cost</varname> configuration parameter</primary>
      </indexterm>
      </term>
      <listitem>
       <para>
        Sets the planner's estimate of the cost of processing
        each row during a query.
        The default is 0.01.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry id="guc-cpu-index-tuple-cost" xreflabel="cpu_index_tuple_cost">
      <term><varname>cpu_index_tuple_cost</varname> (<type>floating point</type>)
      <indexterm>
       <primary><varname>cpu_index_tuple_cost</varname> configuration parameter</primary>
      </indexterm>
      </term>
      <listitem>
       <para>
        Sets the planner's estimate of the cost of processing
        each index entry during an index scan.
        The default is 0.005.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry id="guc-cpu-operator-cost" xreflabel="cpu_operator_cost">
      <term><varname>cpu_operator_cost</varname> (<type>floating point</type>)
      <indexterm>
       <primary><varname>cpu_operator_cost</varname> configuration parameter</primary>
      </indexterm>
      </term>
      <listitem>
       <para>
        Sets the planner's estimate of the cost of processing each
        operator or function executed during a query.
        The default is 0.0025.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry id="guc-parallel-setup-cost" xreflabel="parallel_setup_cost">
      <term><varname>parallel_setup_cost</varname> (<type>floating point</type>)
      <indexterm>
       <primary><varname>parallel_setup_cost</varname> configuration parameter</primary>
      </indexterm>
      </term>
      <listitem>
       <para>
        Sets the planner's estimate of the cost of launching parallel worker
        processes.
        The default is 1000.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry id="guc-parallel-tuple-cost" xreflabel="parallel_tuple_cost">
      <term><varname>parallel_tuple_cost</varname> (<type>floating point</type>)
      <indexterm>
       <primary><varname>parallel_tuple_cost</varname> configuration parameter</primary>
      </indexterm>
      </term>
      <listitem>
       <para>
        Sets the planner's estimate of the cost of transferring one tuple
        from a parallel worker process to another process.
        The default is 0.1.
       </para>
      </listitem>
     </varlistentry>

     <varlistentry id="guc-min-parallel-table-scan-size" xreflabel="min_parallel_table_scan_size">
      <term><varname>min_parallel_table_scan_size</varname> (<type>integer</type>)
      <indexterm>
       <primary><varname>min_parallel_table_scan_size</varname> configuration parameter</primary>
      </indexterm>
      </term>
      <listitem>
       <para>
        Sets the minimum amount of table data that must be scanned in order
        for a parallel scan to be considered.  For a parallel sequential scan,
        the amount of table data scanned is always equal to the size of the
        table, but when indexes are used the amount of table data
        scanned will normally be less.
        If this value is specified without units, it is taken as blocks,
        that is <symbol>BLCKSZ</symbol> bytes, typically 8kB.
        The default is 8 megabytes (<literal>8MB</literal>).
       </para>
      </listitem>
     </varlistentry>

     <varlistentry id="guc-min-parallel-index-scan-size" xreflabel="min_parallel_index_scan_size">
      <term><varname>min_parallel_index_scan_size</varname> (<type>integer</type>)
      <indexterm>
       <primary><varname>min_parallel_index_scan_size</varname> configuration parameter</primary>
      </indexterm>
      </term>
      <listitem>
       <para>
        Sets