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<h2 class="title" style="clear: both"><a id="log_set_config_parameter"></a>log_set_config</h2>
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<p>
Configures the Berkeley DB logging subsystem.
</p>
<p>
The syntax of this parameter in the <a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a> file is a
single line with the string
<code class="literal">log_set_config</code>, one or more whitespace
characters, method <span class="bold"><strong>flag</strong></span>
parameter as a string, optionally one or more whitespace
characters, and the string <code class="literal">on</code> or
<code class="literal">off</code>. If the optional string is
omitted, the default is <code class="literal">on.</code>
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<p>
The method <span class="bold"><strong>flag</strong></span> parameters are:
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DB_LOG_DIRECT
<p>
Turns off system buffering of Berkeley DB log files to avoid double caching.
</p></li>
<li>
DB_LOG_DSYNC
<p>Configures Berkeley DB to flush log writes to the backing disk before returning from the
write system call, rather than flushing log writes explicitly in a separate system call, as
necessary.</p></li>
</ul>
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<p>For more information, see <a class="xref" href="envlog_set_config.html" title="DbEnv::log_set_config()">DbEnv::log_set_config()</a>. </p>
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