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Release 5.2.28 on 6/10/2011
2011-09-13 17:44:24 +00:00
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Release 5.3.21 5/11/2012
2012-11-14 21:35:20 +00:00
<p>Library Version 11.2.5.3</p>
Release 5.2.28 on 6/10/2011
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<th colspan="3" align="center">DB_ENV-&gt;set_lk_max_lockers()</th>
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<td width="20%" align="left"><a accesskey="p" href="envset_lk_detect.html">Prev</a> </td>
<th width="60%" align="center">Chapter 6. 
The DB_LOCK Handle
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<h2 class="title" style="clear: both"><a id="envset_lk_max_lockers"></a>DB_ENV-&gt;set_lk_max_lockers()</h2>
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<pre class="programlisting">#include &lt;db.h&gt;
int
DB_ENV-&gt;set_lk_max_lockers(DB_ENV *dbenv, u_int32_t max); </pre>
<p>
This method is deprecated. Instead, use
<a class="xref" href="envset_memory_init.html" title="DB_ENV-&gt;set_memory_init()">DB_ENV-&gt;set_memory_init()</a>,
<a class="xref" href="envset_memory_max.html" title="DB_ENV-&gt;set_memory_max()">DB_ENV-&gt;set_memory_max()</a>, and
<a class="xref" href="envset_lk_tablesize.html" title="DB_ENV-&gt;set_lk_tablesize()">DB_ENV-&gt;set_lk_tablesize()</a>.
</p>
<p>
Sets the maximum number of locking entities supported by the Berkeley
DB environment. This value is used by
<a class="xref" href="envopen.html" title="DB_ENV-&gt;open()">DB_ENV-&gt;open()</a> to estimate how
much space to allocate for various lock-table data structures. The
default value is 1000 lockers. For specific information on
configuring the size of the lock subsystem, see
<a href="../../programmer_reference/lock_max.html" class="olink">Configuring locking: sizing the system</a>.
</p>
<p>
The database environment's maximum number of lockers 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_lk_max_lockers", one or more whitespace characters, and the
number of lockers. 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_lk_max_lockers()</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_lk_max_lockers()</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_lk_max_lockers()</code> will be
ignored.
</p>
<p>
The <code class="methodname">DB_ENV-&gt;set_lk_max_lockers()</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 5.3.21 5/11/2012
2012-11-14 21:35:20 +00:00
<h3 class="title"><a id="idp60450512"></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 5.3.21 5/11/2012
2012-11-14 21:35:20 +00:00
<h4 class="title"><a id="idp60449864"></a>max</h4>
Release 5.2.28 on 6/10/2011
2011-09-13 17:44:24 +00:00
</div>
</div>
</div>
<p>
The <span class="bold"><strong>max</strong></span> parameter is the maximum
number simultaneous locking entities supported by the Berkeley DB
environment.
</p>
</div>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
Release 5.3.21 5/11/2012
2012-11-14 21:35:20 +00:00
<h3 class="title"><a id="idp60465064"></a>Errors</h3>
Release 5.2.28 on 6/10/2011
2011-09-13 17:44:24 +00:00
</div>
</div>
</div>
<p>
The <code class="methodname">DB_ENV-&gt;set_lk_max_lockers()</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 5.3.21 5/11/2012
2012-11-14 21:35:20 +00:00
<h4 class="title"><a id="idp60492136"></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 5.3.21 5/11/2012
2012-11-14 21:35:20 +00:00
<h3 class="title"><a id="idp60448968"></a>Class</h3>
Release 5.2.28 on 6/10/2011
2011-09-13 17:44:24 +00:00
</div>
</div>
</div>
<p>
<a class="link" href="env.html" title="Chapter 5.  The DB_ENV Handle">DB_ENV</a>,
<a class="link" href="lock.html" title="Chapter 6.  The DB_LOCK Handle">DB_LOCK</a>
</p>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
Release 5.3.21 5/11/2012
2012-11-14 21:35:20 +00:00
<h3 class="title"><a id="idp60494368"></a>See Also</h3>
Release 5.2.28 on 6/10/2011
2011-09-13 17:44:24 +00:00
</div>
</div>
</div>
<p>
<a class="xref" href="lock.html#locklist" title="Locking Subsystem and Related Methods">Locking Subsystem and Related Methods</a>
</p>
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<a accesskey="u" href="lock.html">Up</a>
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<td width="40%" align="right"> <a accesskey="n" href="envset_lk_max_locks.html">Next</a></td>
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<td width="40%" align="left" valign="top">DB_ENV-&gt;set_lk_detect() </td>
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