#include <db.h>

int
DB_ENV->get_lg_regionmax(DB_ENV *dbenv, u_int32_t *lg_regionmaxp);  

The DB_ENV->get_lg_regionmax() method returns the size of the underlying logging subsystem region. You can manage this value using the DB_ENV->set_lg_regionmax() method.

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

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