<!--$Id: env_set_lk_max_lockers.so,v 1.6 2001/10/22 15:24:30 bostic Exp $--> <!--Copyright 1997-2001 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 width="100%"><tr valign=top> <td> <h1>DbEnv.set_lk_max_lockers</h1> </td> <td align=right> <a href="../../db4-devel-4.0.14/api_java/c_index.html"><img src="../../db4-4.0.14/images/api.gif" alt="API"></a><a href="../reftoc.html"><img src="../../db4-4.0.14/images/ref.gif" alt="Ref"></a> </td></tr></table> <hr size=1 noshade> <tt> <h3><pre> import com.sleepycat.db.*; <p> public void set_lk_max_lockers(int max) throws DbException; </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="../../db4-devel-4.0.14/api_java/env_open.html">DbEnv.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="../../db4-devel-4.0.14/ref/lock/max.html">Configuring locking: sizing the system</a>. <p>The DbEnv.set_lk_max_lockers interface may be used only to configure Berkeley DB before the <a href="../../db4-devel-4.0.14/api_java/env_open.html">DbEnv.open</a> interface is called. <p>The DbEnv.set_lk_max_lockers method throws an exception that encapsulates a non-zero error value on failure. <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>The DbEnv.set_lk_max_lockers method may fail and throw an exception encapsulating a non-zero error for the following conditions: <p><dl compact> <p><dt>EINVAL<dd>An invalid flag value or parameter was specified. <p>Called after <a href="../../db4-devel-4.0.14/api_java/env_open.html">DbEnv.open</a> was called. </dl> <p>The DbEnv.set_lk_max_lockers method may fail and throw an exception for errors specified for other Berkeley DB and C library or system methods. If a catastrophic error has occurred, the DbEnv.set_lk_max_lockers method may fail and throw a <a href="../../db4-devel-4.0.14/api_java/runrec_class.html">DbRunRecoveryException</a>, in which case all subsequent Berkeley DB calls will fail in the same way. <h1>Class</h1> <a href="../../db4-devel-4.0.14/api_java/dbenv_class.html">DbEnv</a>, <a href="../../db4-devel-4.0.14/api_java/lock_class.html">DbLock</a> <h1>See Also</h1> <a href="../../db4-devel-4.0.14/api_java/env_set_lk_conflicts.html">DbEnv.set_lk_conflicts</a>, <a href="../../db4-devel-4.0.14/api_java/env_set_lk_detect.html">DbEnv.set_lk_detect</a>, <a href="../../db4-devel-4.0.14/api_java/env_set_lk_max_lockers.html">DbEnv.set_lk_max_lockers</a>, <a href="../../db4-devel-4.0.14/api_java/env_set_lk_max_locks.html">DbEnv.set_lk_max_locks</a>, <a href="../../db4-devel-4.0.14/api_java/env_set_lk_max_objects.html">DbEnv.set_lk_max_objects</a>, <a href="../../db4-devel-4.0.14/api_java/lock_detect.html">DbEnv.lock_detect</a>, <a href="../../db4-devel-4.0.14/api_java/lock_get.html">DbEnv.lock_get</a>, <a href="../../db4-devel-4.0.14/api_java/lock_id.html">DbEnv.lock_id</a>, <a href="../../db4-devel-4.0.14/api_java/lock_id_free.html">DbEnv.lock_id_free</a>, <a href="../../db4-devel-4.0.14/api_java/lock_put.html">DbEnv.lock_put</a>, and <a href="../../db4-devel-4.0.14/api_java/lock_stat.html">DbEnv.lock_stat</a>. </tt> <table width="100%"><tr><td><br></td><td align=right> <a href="../../db4-devel-4.0.14/api_java/c_index.html"><img src="../../db4-4.0.14/images/api.gif" alt="API"></a><a href="../reftoc.html"><img src="../../db4-4.0.14/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>