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    <h1>22. Virtuoso Functions Guide - vd_statistics</h1>
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  <div id="text">
    <h2>vd_statistics</h2>
    <div class="refpurpose">Update VDB RPC cost statistics for given DSN</div>
    <div class="funcsynopsis">
        <span class="funcdef">DB.DBA.<span class="function">VD_STATISTICS</span>
      </span>
	(<span class="paramdefoptional">[in <span class="optional">_dsn</span> varchar]</span>, 
	<span class="paramdefoptional">[in <span class="optional">vd_table_mask</span> varchar]</span>);
      </div>
  
  
  
  <div class="refsect1">
    <div class="refsect1title">Description</div>
    <p>This procedure will update the RPC round-trip statistics for
	selected data sources.</p>
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  <div class="refsect1">
    <div class="refsect1title">Parameters</div>
    <div class="refsect2">
        <span class="refsect2title">_dsn – </span>
      This parameter is a LIKE mask for the name of the data source,
	  as stored in DS_DSN column of SYS_DATA_SOURCE system table.  Its
	  default value of &#39;%&#39; means update the &quot;round-trip&quot; times for all
	  remote data sources.
    </div>
    <div class="refsect2">
        <span class="refsect2title">vd_table_mask – </span>
      This parameter is a LIKE mask for the name of the table ,
	  as stored in RT_NAME column of SYS_DATA_SOURCE system table.  Its
	  default value of &#39;%&#39; means update all tables.
    </div>
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    <div class="refsect1title">See Also</div>
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        <a href="fn_vdd_measure_rpc_time.html">vdd_measure_rpc_time()</a>
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