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<h2 class="title" style="clear: both"><a id="set_lk_detect_parameter"></a>set_lk_detect</h2>
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<p>
Sets the maximum number of locking entities supported by the Berkeley DB
environment. This value is used by Berkeley DB to estimate how much
space to allocate for various lock-table data structures.
When using the DB, the default value is 2,000 lockers.
</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">set_lk_detect</code>, one or more whitespace
characters, and the method <span class="bold"><strong>detect
</strong></span>parameter as a string. The detect parameter
configures the deadlock detector. The deadlock detector
will reject the lock request with the lowest priority. If
multiple lock requests have the lowest priority, then the
detect parameter is used to select which of those lock
requests to reject.
</p>
<p>
For example:
</p>
<pre class="programlisting">set_lk_detect DB_LOCK_OLDEST</pre>
<p>
Sets the deadlock detector such that the lock request for
the locker ID with the oldest lock is rejected.
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<p>
The <span class="bold"><strong>detect</strong></span> parameter
values are:
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DB_LOCK_DEFAULT
</li>
<li>
DB_LOCK_EXPIRE
</li>
<li>
DB_LOCK_MAXLOCKS
</li>
<li>
DB_LOCK_MAXWRITE
</li>
<li>
DB_LOCK_MINLOCKS
</li>
<li>
DB_LOCK_MINWRITE
</li>
<li>
DB_LOCK_OLDEST
</li>
<li>
DB_LOCK_RANDOM
</li>
<li>
DB_LOCK_YOUNGEST
</li>
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<p>For more information, see <a class="xref" href="envset_lk_detect.html" title="DbEnv::set_lk_detect()">DbEnv::set_lk_detect()</a>. </p>
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