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Release 5.2.28 on 6/10/2011
2011-09-13 17:44:24 +00:00
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<p>Library Version 11.2.5.2</p>
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<th colspan="3" align="center">DB_ENV-&gt;set_lg_regionmax()</th>
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<td width="20%" align="left"><a accesskey="p" href="envset_lg_max.html">Prev</a> </td>
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The DB_LSN Handle
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<div class="sect1" lang="en" xml:lang="en">
<div class="titlepage">
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<h2 class="title" style="clear: both"><a id="envset_lg_regionmax"></a>DB_ENV-&gt;set_lg_regionmax()</h2>
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<pre class="programlisting">#include &lt;db.h&gt;
int
DB_ENV-&gt;set_lg_regionmax(DB_ENV *dbenv, u_int32_t lg_regionmax); </pre>
<p>
Set the size of the underlying logging area of the Berkeley DB
environment, in bytes. By default, or if the value is set to 0, the
minimum region size is used, approximately 128KB. The log region is
used to store filenames, and so may need to be increased in size if a
large number of files will be opened and registered with the specified
Berkeley DB environment's log manager.
</p>
<p>
The database environment's log region size may also be configured
using the environment's <a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a> file. The syntax of the entry
in that file is a single line with the string "set_lg_regionmax",
one or more whitespace characters, and the size in bytes. Because
the <a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a> file is read when the database environment is
opened, it will silently overrule configuration done before that
time.
</p>
<p>
The <code class="methodname">DB_ENV-&gt;set_lg_regionmax()</code> method configures a database
environment, not only operations performed using the specified
<a class="link" href="env.html" title="Chapter 5.  The DB_ENV Handle">DB_ENV</a> handle.
</p>
<p>
The <code class="methodname">DB_ENV-&gt;set_lg_regionmax()</code> method may not be called after the
<a class="xref" href="envopen.html" title="DB_ENV-&gt;open()">DB_ENV-&gt;open()</a> method is
called. If the database environment already exists when
<a class="xref" href="envopen.html" title="DB_ENV-&gt;open()">DB_ENV-&gt;open()</a> is called, the
information specified to <code class="methodname">DB_ENV-&gt;set_lg_regionmax()</code> will be ignored.
</p>
<p>
The <code class="methodname">DB_ENV-&gt;set_lg_regionmax()</code> <span>
<span>
method returns a non-zero error value on failure and 0 on success.
</span>
</span>
</p>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
Release 5.2.36 on 9/14/2022
2011-12-20 00:07:10 +00:00
<h3 class="title"><a id="id3730738"></a>Parameters</h3>
Release 5.2.28 on 6/10/2011
2011-09-13 17:44:24 +00:00
</div>
</div>
</div>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
Release 5.2.36 on 9/14/2022
2011-12-20 00:07:10 +00:00
<h4 class="title"><a id="id3730904"></a>lg_regionmax</h4>
Release 5.2.28 on 6/10/2011
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</div>
</div>
</div>
<p>
The <span class="bold"><strong>lg_regionmax</strong></span> parameter is the
size of the logging area in the Berkeley DB environment, in bytes.
</p>
</div>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
Release 5.2.36 on 9/14/2022
2011-12-20 00:07:10 +00:00
<h3 class="title"><a id="id3731067"></a>Errors</h3>
Release 5.2.28 on 6/10/2011
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</div>
</div>
</div>
<p>
The <code class="methodname">DB_ENV-&gt;set_lg_regionmax()</code> <span>
<span>
method may fail and return one of the following non-zero errors:
</span>
</span>
</p>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
Release 5.2.36 on 9/14/2022
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<h4 class="title"><a id="id3731275"></a>EINVAL</h4>
Release 5.2.28 on 6/10/2011
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</div>
</div>
</div>
<p>
If the method was called after <a class="xref" href="envopen.html" title="DB_ENV-&gt;open()">DB_ENV-&gt;open()</a>
was called; or if an invalid flag value or parameter was specified.
</p>
</div>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
Release 5.2.36 on 9/14/2022
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<h3 class="title"><a id="id3730905"></a>Class</h3>
Release 5.2.28 on 6/10/2011
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</div>
</div>
</div>
<p>
<a class="link" href="env.html" title="Chapter 5.  The DB_ENV Handle">DB_ENV</a>,
<a class="link" href="logc.html" title="The DB_LOGC Handle">DB_LOGC</a>,
<a class="link" href="lsn.html" title="Chapter 7.  The DB_LSN Handle">DB_LSN</a>
</p>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
Release 5.2.36 on 9/14/2022
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<h3 class="title"><a id="id3731311"></a>See Also</h3>
Release 5.2.28 on 6/10/2011
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</div>
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<a class="xref" href="lsn.html#loglist" title="Logging Subsystem and Related Methods">Logging Subsystem and Related Methods</a>
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