za_read_derive (ksp, "mfu_ghost_hits", "cache_result", "mfu_ghost-hit");
za_read_derive (ksp, "mru_hits", "cache_result", "mru-hit");
za_read_derive (ksp, "mru_ghost_hits", "cache_result", "mru_ghost-hit");
za_read_derive (ksp, "mfu_ghost_hits", "cache_result", "mfu_ghost-hit");
za_read_derive (ksp, "mru_hits", "cache_result", "mru-hit");
za_read_derive (ksp, "mru_ghost_hits", "cache_result", "mru_ghost-hit");