#include <db_cxx.h> int DbEnv::mutex_set_init(u_int32_t init);
Configure the inital number of mutexes to allocate.
         Berkeley DB allocates a default number of mutexes based on the
         initial configuration of the database environment.  The
         DbEnv::mutex_set_init() method is used to
         override this default number of mutexes to allocate.  This may be done
         to either speed up startup, or to force more work to be done at
         startup to avoid later contention due to allocation.
     
The database environment's inital number of mutexes 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 "mutex_set_init", one or more whitespace characters, and the initial number of mutexes. Because the DB_CONFIG file is read when the database environment is opened, it will silently overrule configuration done before that time.
         The DbEnv::mutex_set_init() method
         configures a database environment, not only operations performed
         using the specified DbEnv
         handle.
     
         The DbEnv::mutex_set_init() method may not
         be called after the 
         DbEnv::open()  method is
         called.  If the database environment already exists when 
         DbEnv::open()  is called, the
         information specified to
         DbEnv::mutex_set_init() will be ignored.
     
         The DbEnv::mutex_set_init() 
            
            
                method either returns a non-zero error value or throws an
                exception that encapsulates a non-zero error value on
                failure, and returns 0 on success.
            
        
     
             The DbEnv::mutex_set_init() 
            
            
                method may fail and throw a DbException 
                exception, encapsulating one of the following non-zero errors, or return one
                of the following non-zero errors: