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Berkeley DB: DbEnv.set_lk_max
DbEnv.set_lk_max
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import com.sleepycat.db.*;
public void set_lk_max(int max)
throws DbException;
Description
The DbEnv.set_lk_max method interface has been deprecated in favor of
the DbEnv.set_lk_max_locks, DbEnv.set_lk_max_lockers,
and DbEnv.set_lk_max_objects methods. Please update your applications.
Set each of the maximum number of locks, lockers, and lock objects
supported by the Berkeley DB lock subsystem to max. 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 interface may be used only to configure Berkeley DB before
the DbEnv.open interface is called.
The DbEnv.set_lk_max 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", 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 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 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 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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