2011-09-13 17:44:24 +00:00
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>log file pre-allocation</title>
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB Upgrade Guide" />
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<link rel="up" href="upgrade_3_1_toc.html" title="Chapter 13. Upgrading Berkeley DB 3.0 applications to Berkeley DB 3.1" />
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<link rel="prev" href="upgrade_3_1_tmp.html" title="DB_TMP_DIR" />
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<link rel="next" href="upgrade_3_1_disk.html" title="Upgrade Requirements" />
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<div class="libver">
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2012-11-14 21:35:20 +00:00
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<p>Library Version 11.2.5.3</p>
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2011-09-13 17:44:24 +00:00
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">log file pre-allocation</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="upgrade_3_1_tmp.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 13. Upgrading Berkeley DB 3.0 applications to Berkeley DB 3.1</th>
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<td width="20%" align="right"> <a accesskey="n" href="upgrade_3_1_disk.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="upgrade_3_1_logalloc"></a>log file pre-allocation</h2>
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</div>
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</div>
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</div>
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<p>This change only affects Win/32 applications.</p>
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<p>On Win/32 platforms Berkeley DB no longer pre-allocates log files. The problem
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was a noticeable performance spike as each log file was created. To turn
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this feature back on, search for the flag DB_OSO_LOG in the source file
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<code class="filename">log/log_put.c</code> and make the change described there, or contact
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us for assistance.</p>
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="upgrade_3_1_tmp.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="upgrade_3_1_toc.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="upgrade_3_1_disk.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">DB_TMP_DIR </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> Upgrade Requirements</td>
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</tr>
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</table>
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</div>
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</body>
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