#include <db_cxx.h> int Db::get_cachesize(u_int32_t *gbytesp, u_int32_t *bytesp, int *ncachep);
         The Db::get_cachesize() method returns the current size and
         composition of the cache. These values may be set using the
         Db::set_cachesize()
         method.
    
         The Db::get_cachesize() method may be called at any time during the
         life of the application.
    
         The Db::get_cachesize() 
            
            
                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 bytesp parameter references memory into which the additional bytes of memory in the cache is copied.
The gbytesp parameter references memory into which the gigabytes of memory in the cache is copied.