81 lines
6.1 KiB
HTML
81 lines
6.1 KiB
HTML
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<meta name="DC.Title" content="Performance data files" />
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<meta name="abstract" content="You can generate database files from the collection objects maintained by Collection Services. Use this topic to find the names, descriptions and attributes of these database files." />
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<title>Performance data files</title>
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</head>
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<body id="rzahxperfdatafiles1"><a name="rzahxperfdatafiles1"><!-- --></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">Performance data files</h1>
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<div><p>You can generate database files from the collection objects maintained
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by Collection Services. Use this topic to find the names, descriptions and
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attributes of these database files.</p>
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<p>Performance data is a set of information about the operation of a system
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(or network of systems) that can be used to understand response time and throughput.
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You can use performance data to make adjustments to programs, system attributes,
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and operations. These adjustments can improve response times and throughputs.
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Adjustments can also help you to predict the effects of certain changes to
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the system, operation, or program.</p>
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<p>Collection Services collects performance data into a management
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collection object (*MGTCOL). The <span class="cmdname">Create Performance Data (CRTPFRDTA)</span> command
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processes data from that collection object and stores the result into performance
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database files. The database files are divided into the following categories:</p>
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<dl><dt class="dlterm"><a href="rzahxperfdatafiles1a.htm#rzahxperfdatafiles1a">Performance
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data files containing time interval data</a></dt>
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<dd>These files contain performance data that is collected each interval.
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To understand where the data in these files comes from, see <a href="rzahxcatfilerelation.htm#rzahxcatfilerelation">system
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category and file relationships</a>. When viewing these files, you might
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also find the <a href="rzahxperfdataabbrev.htm#rzahxperfdataabbrev">file
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abbreviations</a> useful.</dd>
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<dt class="dlterm"><a href="rzahxconfigdata.htm#rzahxconfigdata">Configuration data files</a></dt>
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<dd>Configuration data is collected once per session. To understand where
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the data in these files comes from, refer to system category and file relationships.
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You can find the QAPMCONF, QAPMHDWR, and QAPMSBSD files in the configuration
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data files.</dd>
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<dt class="dlterm"><a href="rzahxtracedata.htm#rzahxtracedata">Trace data files</a></dt>
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<dd>Trace data is collected only when you choose to do so. You can find the
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QAPMDMPT file in the trace data files.</dd>
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</dl>
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<p>Additional field information such as number of bytes and buffer position
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is available by using the <span class="cmdname">Display File Field Description (DSPFFD)</span> command
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available on the system. For example, type the following on any command line:</p>
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<pre>DSPFFD file(QSYS/QAPMCONF)</pre>
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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="rzahxapsparent.htm" title="Managing performance on iSeries systems requires the use of a variety of specialized applications. Each of these applications offers a specific insight into system performance. This topic explains several applications and the intended use of each application.">Applications for performance management</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="rzahxtasktypeext.htm" title="A task type extender identifies the area of functional support provided by the task.">Performance data files: Task type extender</a></div>
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<div><a href="rzahxcollectinfosysperf.htm" title="Collection Services regularly collects information about system performance. Often, analyzing performance data begins with this information.">Collect system performance data</a></div>
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</div>
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</div>
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