import com.sleepycat.db.*;

public void set_lk_max_locks(int max)
    throws DbException;

Description

Set the maximum number of locks supported by the Berkeley DB lock subsystem. This value is used by DbEnv.open to estimate how much space to allocate for various lock-table data structures. The default value is 1000 locks. For specific information on configuring the size of the lock subsystem, see Configuring locking: sizing the system.

The DbEnv.set_lk_max_locks method configures a database environment, not only operations performed using the specified DbEnv handle.

The DbEnv.set_lk_max_locks interface may not be called after the DbEnv.open interface is called. If the database environment already exists when DbEnv.open is called, the information specified to DbEnv.set_lk_max_locks will be ignored.

The DbEnv.set_lk_max_locks method throws an exception that encapsulates a non-zero error value on failure.

The database environment's maximum number of locks may also be set using the environment's DB_CONFIG file. The syntax of the entry in that file is a single line with the string "set_lk_max_locks", one or more whitespace characters, and the number of locks. Because the DB_CONFIG file is read when the database environment is opened, it will silently overrule configuration done before that time.

Errors

The DbEnv.set_lk_max_locks method may fail and throw an exception encapsulating a non-zero error for the following conditions:

EINVAL

An invalid flag value or parameter was specified.

Called after DbEnv.open was called.

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. If a catastrophic error has occurred, the DbEnv.set_lk_max_locks method may fail and throw a DbRunRecoveryException, in which case all subsequent Berkeley DB calls will fail in the same way.

Class

See Also