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<title>Berkeley DB: DbEnv.set_lk_max_locks</title>
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<h1>DbEnv.set_lk_max_locks</h1>
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import com.sleepycat.db.*;
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public void set_lk_max_locks(int max)
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<p>Set the maximum number of locks supported by the Berkeley DB lock subsystem.
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This value is used by <a href="../api_java/env_open.html">DbEnv.open</a> to estimate how much space to
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allocate for various lock-table data structures. The default value is
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1000 locks. For specific information on configuring the size of the lock
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subsystem, see <a href="../ref/lock/max.html">Configuring locking:
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sizing the system</a>.
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<p>The DbEnv.set_lk_max_locks method configures a database environment, not only operations
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performed using the specified <a href="../api_java/env_class.html">DbEnv</a> handle.
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<p>The DbEnv.set_lk_max_locks interface may not be called after the <a href="../api_java/env_open.html">DbEnv.open</a>
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If the database environment already exists when
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<a href="../api_java/env_open.html">DbEnv.open</a> is called, the information specified to DbEnv.set_lk_max_locks
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<p>The DbEnv.set_lk_max_locks method throws an exception that encapsulates a non-zero error value on
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<p>The database environment's maximum number of locks may also be set using the environment's
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<b>DB_CONFIG</b> file. The syntax of the entry in that file is a
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single line with the string "set_lk_max_locks", one or more whitespace characters,
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and the number of locks. Because the <b>DB_CONFIG</b> file is read when the database
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environment is opened, it will silently overrule configuration done
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<p>The DbEnv.set_lk_max_locks method may fail and throw an exception encapsulating a non-zero error for the following conditions:
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<p><dt>EINVAL<dd>An invalid flag value or parameter was specified.
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<p>Called after <a href="../api_java/env_open.html">DbEnv.open</a> was called.
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<p>The DbEnv.set_lk_max_locks method may fail and throw an exception for errors specified for other Berkeley DB and C library or system methods.
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If a catastrophic error has occurred, the DbEnv.set_lk_max_locks method may fail and
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throw a <a href="../api_java/runrec_class.html">DbRunRecoveryException</a>,
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in which case all subsequent Berkeley DB calls will fail in the same way.
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<a href="../api_java/env_class.html">DbEnv</a>, <a href="../api_java/lock_class.html">DbLock</a>
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<a href="../api_java/lock_list.html">Locking Subsystem and Related Methods</a>
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