#include <db.h>

int
DB_ENV->set_lg_regionmax(DB_ENV *dbenv, u_int32_t lg_regionmax);  

Set the size of the underlying logging area of the Berkeley DB environment, in bytes. By default, or if the value is set to 0, the minimum region size is used, approximately 128KB. The log region is used to store filenames, and so may need to be increased in size if a large number of files will be opened and registered with the specified Berkeley DB environment's log manager.

The database environment's log region size may also be configured using the environment's DB_CONFIG file. The syntax of the entry in that file is a single line with the string "set_lg_regionmax", one or more whitespace characters, and the size in bytes. 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_lg_regionmax() method configures a database environment, not only operations performed using the specified DB_ENV handle.

The DB_ENV->set_lg_regionmax() 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_lg_regionmax() will be ignored.

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