#include <db.h> int DB_ENV->get_lg_bsize(DB_ENV *dbenv, u_int32_t *lg_bsizep);
         The DB_ENV->get_lg_bsize() method returns the size of the log buffer,
         in bytes. You can manage this value using the 
         DB_ENV->set_lg_bsize()
         method.
    
         The DB_ENV->get_lg_bsize() method may be called at any time during
         the life of the application.
    
         The DB_ENV->get_lg_bsize() 
            
                  method returns a non-zero error value on failure and 0 on success.