77 lines
5.4 KiB
HTML
77 lines
5.4 KiB
HTML
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<meta name="DC.Title" content="Tune performance" />
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<meta name="abstract" content="When you have identified a performance problem, you will want to tune the system to fix it." />
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<title>Tune performance</title>
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</head>
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<body id="rzahxtune"><a name="rzahxtune"><!-- --></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">Tune performance</h1>
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<div><p>When you have identified a performance problem, you will want to
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tune the system to fix it.</p>
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<p>The primary aim of performance tuning is to allow your servers to make
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the best use of the system resources, and to allow workloads to run as efficiently
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as possible. Performance tuning is a way to adjust the performance of the
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system either manually or automatically. Many options exist for tuning your
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system. Each system environment is unique in that it requires you to observe
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performance and make adjustments that are best for your environment; in other
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words, you are required to do routine performance monitoring.</p>
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<p>IBM<sup>®</sup> also
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offers a tool that allows you to improve both the I/O subsystem and system
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response times by reducing the number of physical I/O requests that are read
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from disk. Learn how you can improve your system performance with Extended
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Adaptive Cache.</p>
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<p>In addition, you may also want to consider some tuning options that allow
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processes and threads to achieve improved affinity for memory and processor
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resources.</p>
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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="rzahxtunebasic.htm">Basic performance tuning</a></strong><br />
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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.</li>
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<li class="ulchildlink"><strong><a href="rzahxtuneautotune.htm">Automatically tune performance</a></strong><br />
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Most users should set up the system to make performance adjustment automatically. When new systems are shipped, they are configured to adjust automatically.</li>
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<li class="ulchildlink"><strong><a href="rzahxmultithread.htm">Determine when to use simultaneous multithreading</a></strong><br />
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Simultaneous multithreading allows sharing of process facilities to run two applications or two threads of the same application at the same time. Find out more about this concept.</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="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzahxintro.htm" title="You can use Extended Adaptive Cache to improve system performance by collecting disk usage data, and then using those statistics to create a cache, effectively reducing the physical I/O requests for the disk.">Extended Adaptive Cache</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="../rzakz/rzakzqthdrscafn.htm">Thread affinity system value</a></div>
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<div><a href="../rzakz/rzakzqprcmlttsk.htm">Processor multitasking system value</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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