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Berkeley DB: DbEnv.set_lk_max_locks
DbEnv.set_lk_max_locks
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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 interface may be used only to configure Berkeley DB before
the DbEnv.open interface is called.
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
DbEnv, DbLock
See Also
DbEnv.set_lk_conflicts,
DbEnv.set_lk_detect,
DbEnv.set_lk_max,
DbEnv.set_lk_max_lockers,
DbEnv.set_lk_max_locks,
DbEnv.set_lk_max_objects,
DbEnv.lock_detect,
DbEnv.lock_get,
DbEnv.lock_id,
DbLock.put,
and
DbEnv.lock_stat.
Copyright Sleepycat Software
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