<!--$Id: env_set_lk_max_lockers.so,v 1.2 2000/12/08 22:03:00 bostic Exp $--> <!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.--> <!--All rights reserved.--> <html> <head> <title>Berkeley DB: DbEnv::set_lk_max_lockers</title> <meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> <meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++"> </head> <body bgcolor=white> <a name="2"><!--meow--></a> <table><tr valign=top> <td> <h1>DbEnv::set_lk_max_lockers</h1> </td> <td width="1%"> <a href="../api_cxx/cxx_index.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a> </td></tr></table> <hr size=1 noshade> <tt> <h3><pre> #include <db_cxx.h> <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> <table><tr><td><br></td><td width="1%"> <a href="../api_cxx/cxx_index.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a> </td></tr></table> <p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font> </body> </html>