#include <db.h>
int
DB->get_cachesize(DB *db,
    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 returns a non-zero error value on failure and 0 on success.
            
            
        
     
The gbytesp parameter references memory into which the gigabytes of memory in the cache is copied.
The bytesp parameter references memory into which the additional bytes of memory in the cache is copied.