67 lines
4.4 KiB
HTML
67 lines
4.4 KiB
HTML
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<meta name="DC.Title" content="Dump trace data" />
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<meta name="abstract" content="Deciding when to dump trace data is a significant decision because the dump affects system performance." />
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<meta name="description" content="Deciding when to dump trace data is a significant decision because the dump affects system performance." />
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<meta name="DC.Relation" scheme="URI" content="../cl/dmptrc.htm" />
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<title>Dump trace data</title>
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</head>
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<body id="rzahx3b13"><a name="rzahx3b13"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Dump trace data</h1>
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<div><p>Deciding when to dump trace data is a significant decision because
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the dump affects system performance.</p>
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<p>The <span class="cmdname">Dump Trace (DMPTRC)</span> command puts information from
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an internal trace table into a database file. It is not good to dump trace
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data during peak activity on a loaded system or within a high priority (interactive)
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job. You can delay a trace dump, but you want to dump the data before you
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forget that it exists. If the trace table becomes cleared for any reason,
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you lose the trace data. However, delaying the dump slightly and then using
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the <span class="cmdname">DMPTRC</span> command to dump the trace in a
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batch job can preserve performance for the users.</p>
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<p>To dump trace data, issue the following command:</p>
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<pre> DMPTRC MBR
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<em>(member-name)</em> LIB
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<em>(library-name)</em></pre>
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<p>You must specify a member name and a library name in which to store the
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data. You can collect sample-based data with Collection Services at the same
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time that you collect trace information. When you collect sample data and
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trace data together like this, you should place their data into consistently
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named members. In other words, the names that you provide in the CRTPFRDTA
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TOMBR and TOLIB parameters should be the same as the names that you provide
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in the DMPTRC MBR and LIB parameters.</p>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzahxcollectinfoappperf.htm" title="An application might be performing slowly for a variety of reasons. You can use several of the tools included in i5/OS and other licensed programs to help you get more information.">Collect information about an application's performance</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzahxcollectdatacs.htm" title="Use Collection Services to collect performance data for later analysis by the Performance Tools for iSeries licensed program or other performance report applications, iSeries Navigator monitors, and the graph history function. (If you prefer viewing real-time performance data, system monitors provide an easy-to-use graphical interface for monitoring system performance.)">Collection Services</a></div>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="../cl/dmptrc.htm">Dump Trace (DMPTRC) command</a></div>
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</div>
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</div>
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