54 lines
3.2 KiB
HTML
54 lines
3.2 KiB
HTML
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<meta name="DC.Title" content="Job and thread priorities" />
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<meta name="abstract" content="An i5/OS thread competes with threads throughout the system for scheduling resources in addition to competing with other threads in the same job." />
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<meta name="description" content="An i5/OS thread competes with threads throughout the system for scheduling resources in addition to competing with other threads in the same job." />
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<title>Job and thread priorities</title>
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</head>
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<body id="rzahwpri-prico"><a name="rzahwpri-prico"><!-- --></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">Job and thread priorities</h1>
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<div><p>An <span class="keyword">i5/OS™</span> thread
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competes with threads throughout the system for scheduling resources in addition
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to competing with other threads in the same job.</p>
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<div class="section"><p>The system schedules processing resources by using a delay cost
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scheduler that is based on several delay cost curves (priority ranges).</p>
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</div>
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<div class="section"><p>On <span class="keyword">i5/OS</span>,
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numerically lower priority values indicate higher priority with regard to
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scheduling. Adding its thread priority adjustment value to the job's priority
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specifies the priority of a thread. The default priority for a thread is no
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change from the process priority or a thread priority adjustment value of
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zero. </p>
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</div>
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<div class="section"><p>You can directly affect the application performance by assigning
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different thread priority adjustment values to the threads in your application.</p>
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</div>
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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="rzahwpcoco.htm" title="There are several performance considerations for multithreaded jobs on i5/OS.">Performance considerations in multithreaded applications</a></div>
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</body>
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