get available mem instead of free

src/main.rs

@@ -10,7 +10,7 @@ fn main() -> Result<(), Box<dyn Error>> {
     loop {
         c += 1;
         let sys = System::new_all();
-        let free_mem = sys.free_memory() / 1073741824;
+        let free_mem = sys.available_memory() / 1073741824;
         let total_mem = sys.total_memory() / 1073741824;
         let cpu = sys.global_cpu_usage();
         let ip4 = match local_ip_address::local_ip() {