55 lines
3.5 KiB
HTML
55 lines
3.5 KiB
HTML
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<meta name="DC.Title" content="MAINT parameter tips" />
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<meta name="abstract" content="The type of access path maintenance to specify depends on the number of records and the frequency of add, delete, or update operations on the file while it is closed." />
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<title>MAINT parameter tips</title>
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<body id="rbafonoid17"><a name="rbafonoid17"><!-- --></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">MAINT parameter tips</h1>
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<div><p>The type of access path maintenance to specify depends on the number
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of records and the frequency of add, delete, or update operations
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on the file while it is closed.</p>
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<p>You should use delayed maintenance for files that have relatively few changes
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to the access paths while the file members are closed. Delayed maintenance
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reduces system overhead by reducing the number of access paths that are maintained
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immediately. It might also result in faster open processing, because the access
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paths do not have to be rebuilt.</p>
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<p>You might want to specify immediate maintenance for access paths that are
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used frequently, or when you cannot wait for an access path to be rebuilt
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when the file is opened. You might want to specify delayed maintenance for
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access paths that are not used frequently, if infrequent changes are made
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to the record keys that make up the access path.</p>
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<p>In general, for files used interactively, immediate maintenance results
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in good response time. For files used in batch jobs, either immediate, delayed,
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or rebuild maintenance is adequate, depending on the size of the members and
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the frequency of changes.</p>
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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="rbafoapcurr.htm" title="You can specify how access paths are maintained for closed files with the MAINT parameter.">Specify the current access path maintenance (MAINT) parameter</a></div>
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</div>
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</div>
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