101 lines
7.3 KiB
HTML
101 lines
7.3 KiB
HTML
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<meta name="DC.Title" content="Data collection considerations for PM iSeries" />
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<meta name="abstract" content="PM iSeries uses Collection Services to gather performance data. Learn how PM iSeries and Collection Services work together to provide the data you need." />
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<title>Data collection considerations for PM iSeries</title>
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<body id="rzahxplangrow1pmmgg9"><a name="rzahxplangrow1pmmgg9"><!-- --></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">Data collection considerations for PM <span class="keyword">iSeries</span></h1>
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<div><p>PM <span class="keyword">iSeries™</span> uses
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Collection Services to gather performance data. Learn how PM <span class="keyword">iSeries</span> and
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Collection Services work together to provide the data you need.</p>
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<p>The most important requirement for establishing an accurate trend of the
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system utilization, workload, and performance measurements is consistency.
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Ideally, performance data should be collected 24 hours per day. Because of
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the relationship between PM <span class="keyword">iSeries</span> and
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Collection Services, you need to be aware of the implications that can occur
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when you are using PM <span class="keyword">iSeries</span>.</p>
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<p>Here are some guidelines to help you define your collections when you are
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using PM <span class="keyword">iSeries</span>:</p>
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<ul><li><strong>Select the QMPGDATA library to store your data.</strong> <p>The <span class="uicontrol">Location
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to store collections</span> field uses the default value /QSYS.LIB/QMPGDATA.LIB
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when PM <span class="keyword">iSeries</span> is active.
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If you replace QMPGDATA with some other value, PM <span class="keyword">iSeries</span> cycles
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the collection on the hour and changes it back to QMPGDATA. If you want to
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collect data into a different library, change where PM <span class="keyword">iSeries</span> looks
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for data. Type <span class="uicontrol">GO PM400</span> from the command line, select
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option 3 (Work with Customization), and change the library name.</p>
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</li>
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<li><strong>Collect data continuously with Collection Services.</strong> <p>PM <span class="keyword">iSeries</span> satisfies this requirement by
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collecting data 24 hours a day with Collection Services. PM <span class="keyword">iSeries</span> collects
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performance data at 15-minute intervals. PM <span class="keyword">iSeries</span> uses
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the 15-minute interval default, but does not change what the interval is set
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to. A 15-minute interval is the recommended interval.</p>
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</li>
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<li><strong>Select the Standard plus protocol profile.</strong> <p>Standard plus protocol
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is the default value for the collection profile. The collection profile indicates
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what data is collected. The data categories in the standard plus protocol
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profile correspond to the *ALL value for the DATA parameter on the Start Performance
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Monitor (STRPFRMON) command. If you change this to any other value, PM <span class="keyword">iSeries</span> changes it back on the hour.
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This is true even if you select Custom and include all categories. The change
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takes effect immediately. The collection does not cycle (unless required to
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do so for other reasons). This action is done to gather enough information
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for PM <span class="keyword">iSeries</span> reports.</p>
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</li>
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<li><strong>Avoid making interim changes to collection parameters when PM <span class="keyword">iSeries</span> is active.</strong> <p>For example,
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when you activate PM <span class="keyword">iSeries</span>,
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the <span class="uicontrol">Create database files during collection</span> field is
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checked as the default value. If you change this, PM <span class="keyword">iSeries</span> changes
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it back to the default value on the hour. The change takes effect immediately.
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The collection does not cycle (unless required to do so for other reasons).</p>
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</li>
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<li><strong>Ending Collection Services.</strong> <p>You can end Collection Services
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at any time from <span class="keyword">iSeries Navigator</span>.
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If you end Collection Services, the following considerations apply when PM <span class="keyword">iSeries</span> is running:</p>
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<ul><li>The PM <span class="keyword">iSeries</span> scheduler
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starts Collection Services at the beginning of the next hour.</li>
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<li>Days with little or no data collected are not included in trend calculations.
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Therefore, you should not interrupt Collection Services often.</li>
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</ul>
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</li>
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</ul>
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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="rzahxpm400con.htm" title="Learn about the functions and benefits PM iSeries can provide and about important implementation considerations.">PM iSeries concepts</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="reltasks"><strong>Related tasks</strong><br />
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<div><a href="rzahxplangrow1pmmgg6.htm" title="Learn how you can stop PM iSeries momentarily.">Turn off PM iSeries momentarily</a></div>
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<div><a href="rzahxplangrow1pmmgg1a.htm" title="Now that you have set up your network, you may need to customize PM iSeries to fit your needs.">Customize PM iSeries</a></div>
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</div>
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</div>
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</body>
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</html>
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