#include <db.h>
int
DB_MPOOLFILE->set_maxsize(DB_MPOOLFILE *mpf,
    u_int32_t gbytes, u_int32_t bytes);  
      Set the maximum size for the file to be gbytes gigabytes plus bytes. Attempts to allocate new pages in the file after the limit has been reached will fail.
         To set the maximum file size for a particular database, call the
         DB_MPOOLFILE->set_maxsize() method using the 
         DB_MPOOLFILE  handle stored
         in the mpf field of the 
         DB  handle.  Attempts to insert
         new items into the database after the limit has been reached may fail.
    
         The DB_MPOOLFILE->set_maxsize() method configures a file in the
         cache, not only operations performed using the specified 
         DB_MPOOLFILE  handle.
    
         The DB_MPOOLFILE->set_maxsize() method may be called at any time
         during the life of the application.
    
         The DB_MPOOLFILE->set_maxsize() 
            
                  method returns a non-zero error value on failure and 0 on success.