Berkeley DB: DB_ENV->set_lk_max_objects
Description: Berkeley DB: An embedded database programmatic toolkit.
Keywords: embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++

### DB_ENV->set_lk_max_objects |

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    #include <db.h>

    int
    DB_ENV->set_lk_max_objects(DB_ENV *dbenv, u_int32_t max);

    int
    DB_ENV->get_lk_max_objects(DB_ENV *dbenv, u_int32_t *lk_maxp);

### Description: DB_ENV->set_lk_max_objects

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

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

The DB_ENV->set_lk_max_objects method configures a database environment, not only operations performed using the specified DB_ENV handle.

The DB_ENV->set_lk_max_objects method may not be called after the DB_ENV->open method is called. If the database environment already exists when DB_ENV->open is called, the information specified to DB_ENV->set_lk_max_objects will be ignored.

The DB_ENV->set_lk_max_objects method returns a non-zero error value on failure and 0 on success.

### Parameters

max
  The max parameter is the maximum number of locked objects supported by the Berkeley DB environment.

### Errors

The DB_ENV->set_lk_max_objects method may fail and return one of the following non-zero errors:

EINVAL
  If the method was called after DB_ENV->open was called; or if an invalid flag value or parameter was specified.

### Description: DB_ENV->get_lk_max_objects

The DB_ENV->get_lk_max_objects method returns the maximum number of locked objects.

The DB_ENV->get_lk_max_objects method may be called at any time during the life of the application.

The DB_ENV->get_lk_max_objects method returns a non-zero error value on failure and 0 on success.

### Parameters

lk_maxp
  The DB_ENV->get_lk_max_objects method returns the maximum number of locked objects in lk_maxp.

### Class

DB_ENV, DB_LOCK

### See Also

Locking Subsystem and Related Methods`

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