91 lines
7.0 KiB
HTML
91 lines
7.0 KiB
HTML
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<title>Research a performance problem</title>
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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">Research a performance problem</h1>
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<div><p>There are many options available to help you identify and resolve
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performance problems. Learn how to use the available tools and reports that
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can help you find the source of the performance problem.</p>
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<div class="section"><p>Most of the tools that collect or analyze performance use either
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trace or sample data. Collection Services regularly collects sample data on
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a variety of system resources. Several tools analyze or report on this sample
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data, and you can use this to get a broader view of system resource utilization
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and to answer many common performance questions. For more detailed performance
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information, several tools generate trace-level data. Often, trace-level data
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can provide detailed information about the behavior and resource consumption
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of jobs and applications on your system. Performance Explorer and the <span class="cmdname">Start
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Performance Trace (STRPFRTRC)</span> command are two common tools for generating
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trace data.</p>
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<p>For example, if your system is running slowly, you might
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use the system monitor to look for problems. If you see that the CPU utilization
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is high, you could identify any jobs that seem to be using an unusually large
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amount of resources. Then, you may be able to correct the problem by making
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configuration changes. However, some problems will require additional information.
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To get detailed information about that job's performance you could start a
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performance explorer session, gather detailed information about that job's
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behavior on the server, and potentially make changes to the originating
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program.</p>
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</div>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rzahxresearchidprob.htm">Identify performance problem</a></strong><br />
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Learn the common steps involved with identifying a performance problem.</li>
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<li class="ulchildlink"><strong><a href="rzahxresearchcommon.htm">Identify and resolve common performance problems</a></strong><br />
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Many different performance problems often affect common areas of
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the <span class="keyword">iSeries™</span> server. Learn how
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to research and resolve problems in common areas, for example, backup and
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recovery.</li>
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<li class="ulchildlink"><strong><a href="rzahxcollectinfosysperf.htm">Collect system performance data</a></strong><br />
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Collection Services regularly collects information about system performance. Often, analyzing performance data begins with this information.</li>
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<li class="ulchildlink"><strong><a href="rzahxcollectinforesuse.htm">Collect information about system resource utilization</a></strong><br />
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Several tools monitor how resources like central processing unit (CPU), disk space, interactive capacity, and many other elements, are being used. You can use these tools to start identifying problem areas.</li>
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<li class="ulchildlink"><strong><a href="rzahxcollectinfoappperf.htm">Collect information about an application's performance</a></strong><br />
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An application might be performing slowly for a variety
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of reasons. You can use several of the tools included in <span class="keyword">i5/OS™</span>
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and other licensed programs to help you get more information.</li>
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<li class="ulchildlink"><strong><a href="rzahxcollectinfoexample.htm">Scenario: Improve system performance after an upgrade or migration</a></strong><br />
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In this scenario, you have just upgraded or migrated your system and it now appears to be running slower than before. This scenario will help you identify and fix your performance problem.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzahxmngparent.htm" title="Performance management is necessary to optimize utilization of your computer system by measuring current capabilities, recognizing trends, and making appropriate adjustments to satisfy end user and management requirements such as response time or job throughput. It is needed to maintain business efficiency and avoid prolonged suspension of normal business activities. Therefore, managing performance is part of your daily operations.">Manage iSeries performance</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="rzahxtunebasic.htm" title="To tune your system's performance, you need to set up your initial tuning values, observe the system performance, review the values, and determine what to tune.">Basic performance tuning</a></div>
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