#include <db_cxx.h>

int
DbEnv::set_lk_max_lockers(u_int32_t max);

Description

Set the maximum number of simultaneous locking entities 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. For specific information on configuring the size of the lock subsystem, see Configuring locking: sizing the system.

The DbEnv::set_lk_max_lockers interface may only be used to configure Berkeley DB before the DbEnv::open interface is called.

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.

The database environment's maximum number of lockers 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_lockers", one or more whitespace characters, and the number of lockers. Because the DB_CONFIG file is read when the database environment is opened, it will silently overrule configuration done before that time.

Errors

EINVAL

An invalid flag value or parameter was specified.

Called after DbEnv::open was called.

Classes

See Also