title: Understaning native_stderr file in websphere app server
body: <p>All,
  I am getting the native_stderr.log file while running my application on Websphere App Server 7.0.0.15.
  earlier it used to be simple log file format, but recently I have observed that the file is in XML format.</p>
  
  <p>Is there any IBM provided tool to interpret this file?</p>
  
  <p>The logfile contains sections like this:</p>
  
  <pre><code>&lt;af type="tenured" id="345" timestamp="Sep 07 15:51:45 2011" intervalms="3981.813"&gt;
    &lt;minimum requested_bytes="16400" /&gt;
    &lt;time exclusiveaccessms="0.163" meanexclusiveaccessms="0.163" threads="0" lastthreadtid="0x0000000032D8C700" /&gt;
    &lt;refs soft="24731" weak="22022" phantom="1950" dynamicSoftReferenceThreshold="19" maxSoftReferenceThreshold="32" /&gt;
    &lt;tenured freebytes="4223424" totalbytes="536870912" percent="0" &gt;
      &lt;soa freebytes="0" totalbytes="531503104" percent="0" /&gt;
      &lt;loa freebytes="4223424" totalbytes="5367808" percent="78" /&gt;
    &lt;/tenured&gt;
    &lt;gc type="global" id="347" totalid="347" intervalms="3982.134"&gt;
      &lt;finalization objectsqueued="786" /&gt;
      &lt;timesms mark="677.563" sweep="8.489" compact="0.000" total="686.650" /&gt;
      &lt;tenured freebytes="334476968" totalbytes="536870912" percent="62" &gt;
        &lt;soa freebytes="330253544" totalbytes="531503104" percent="62" /&gt;
        &lt;loa freebytes="4223424" totalbytes="5367808" percent="78" /&gt;
      &lt;/tenured&gt;
    &lt;/gc&gt;
    &lt;tenured freebytes="334460568" totalbytes="536870912" percent="62" &gt;
      &lt;soa freebytes="330237144" totalbytes="531503104" percent="62" /&gt;
      &lt;loa freebytes="4223424" totalbytes="5367808" percent="78" /&gt;
    &lt;/tenured&gt;
    &lt;refs soft="24252" weak="17085" phantom="1950" dynamicSoftReferenceThreshold="19" maxSoftReferenceThreshold="32" /&gt;
    &lt;time totalms="687.356" /&gt;
  &lt;/af&gt;
  </code></pre>
  
  <p>Thanks</p>