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<h1>DbEnv::set_lk_max_lockers</h1>
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<h3><pre>
#include &lt;db_cxx.h&gt;
<p>
int
DbEnv::set_lk_max_lockers(u_int32_t max);
</pre></h3>
<h1>Description</h1>
<p>Set the maximum number of simultaneous locking entities supported by
the Berkeley DB lock subsystem.  This value is used by <a href="../api_cxx/env_open.html">DbEnv::open</a> to
estimate how much space to allocate for various lock-table data
structures.  For specific information on configuring the size of the
lock subsystem, see
<a href="../ref/lock/max.html">Configuring locking: sizing the system</a>.
<p>The DbEnv::set_lk_max_lockers interface may only be used to configure Berkeley DB before
the <a href="../api_cxx/env_open.html">DbEnv::open</a> interface is called.
<p>The DbEnv::set_lk_max_lockers method either returns a non-zero error value or throws an exception that
encapsulates a non-zero error value on failure, and returns 0 on success.
<p>The database environment's maximum number of lockers may also be set using the environment's
<b>DB_CONFIG</b> 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 <b>DB_CONFIG</b> file is read when the database
environment is opened, it will silently overrule configuration done
before that time.
<h1>Errors</h1>
<p><dl compact>
<p><dt>EINVAL<dd>An invalid flag value or parameter was specified.
<p>Called after <a href="../api_cxx/env_open.html">DbEnv::open</a> was called.
</dl>
<h3>Classes</h3>
<a href="../api_cxx/dbenv_class.html">DbEnv</a>, <a href="../api_cxx/lock_class.html">DbLock</a>
<h1>See Also</h1>
<a href="../api_cxx/env_set_lk_conflicts.html">DbEnv::set_lk_conflicts</a>,
<a href="../api_cxx/env_set_lk_detect.html">DbEnv::set_lk_detect</a>,
<a href="../api_cxx/env_set_lk_max_locks.html">DbEnv::set_lk_max_locks</a>,
<a href="../api_cxx/env_set_lk_max_lockers.html">DbEnv::set_lk_max_lockers</a>,
<a href="../api_cxx/env_set_lk_max_objects.html">DbEnv::set_lk_max_objects</a>,
<a href="../api_cxx/env_set_lk_max.html">DbEnv::set_lk_max</a>,
<a href="../api_cxx/lock_detect.html">DbEnv::lock_detect</a>,
<a href="../api_cxx/lock_get.html">DbEnv::lock_get</a>,
<a href="../api_cxx/lock_id.html">DbEnv::lock_id</a>,
<a href="../api_cxx/lock_put.html">DbLock::put</a>,
<a href="../api_cxx/lock_stat.html">DbEnv::lock_stat</a>
and
<a href="../api_cxx/lock_vec.html">DbEnv::lock_vec</a>.
</tt>
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