52 lines
3.2 KiB
HTML
52 lines
3.2 KiB
HTML
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<meta name="abstract" content="For performance enhancement, you can specify some values for the distribute data (DSTDTA) parameter." />
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<title>Performance enhancement tip with DB2 Multisystem</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">Performance enhancement tip with DB2<sup>®</sup> Multisystem</h1>
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<div><p>For performance enhancement, you can specify some values for the
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distribute data (DSTDTA) parameter.</p>
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<p>One way to ensure the best performance is
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to specify *BUFFERED for the DSTDTA parameter on the Override with Database
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File (OVRDBF) command. This tells the system to retrieve data from a distributed
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file as quickly as possible, potentially even at the expense of immediate
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updates that are to be made to the file. DSTDTA(*BUFFERED) is the default
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value for the parameter when a file is opened for read-only purposes.</p>
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<p>The other values for the DSTDTA parameter are *CURRENT and *PROTECTED.
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*CURRENT allows updates by other users to be made to the file, but at some
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expense to performance. When a file is opened for update, DSTDTA(*CURRENT)
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is the default value. *PROTECTED gives performance that is similar to that
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of *CURRENT, but *PROTECTED prevents updates from being made by other users
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while the file is open.</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="whyusedb2.htm" title="Performance improvements can be quite significant for certain queries.">Why you should use DB2 Multisystem</a></div>
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