feat: Increase subnet memory capacity to 2 TiB and subnet memory threshold to 750 GiB (#6086)

This PR increase the subnet memory capacity from 1 TiB to 2 TiB and
subnet memory threshold from 450 GiB to 750 GiB.

Author: ShuoWangNSL

rs/config/src/execution_environment.rs

@@ -12,15 +12,15 @@ const TIB: u64 = GIB * 1024;
 /// This specifies the threshold in bytes at which the subnet memory usage is
 /// considered to be high. If this value is greater or equal to the subnet
 /// capacity, then the subnet is never considered to have high usage.
-const SUBNET_MEMORY_THRESHOLD: NumBytes = NumBytes::new(450 * GIB);
+const SUBNET_MEMORY_THRESHOLD: NumBytes = NumBytes::new(750 * GIB);
 
 /// This is the upper limit on how much logical storage canisters can request to
 /// be store on a given subnet.
 ///
 /// Logical storage is the amount of storage being used from the point of view
 /// of the canister. The actual storage used by the nodes can be higher as the
 /// IC protocol requires storing copies of the canister state.
-const SUBNET_MEMORY_CAPACITY: NumBytes = NumBytes::new(TIB);
+const SUBNET_MEMORY_CAPACITY: NumBytes = NumBytes::new(2 * TIB);
 
 /// This is the upper limit on how much memory can be used by all guaranteed
 /// response canister messages on a given subnet.

rs/rust_canisters/canister_creator/test/test.rs

@@ -102,10 +102,10 @@ fn install_code_works() {
     assert_eq!(result, WasmResult::Reply("null".as_bytes().to_vec()));
 
     // Assert there are 1_001 canisters running with the memory usage below the
-    // subnet storage capacity, which is currently 1 TiB
+    // subnet storage capacity, which is currently 2 TiB
     assert_eq!(env.num_running_canisters(), 1_001);
     assert!(
-        env.canister_memory_usage_bytes() < 1024 * 1024 * 1024 * 1024,
+        env.canister_memory_usage_bytes() < 2 * 1024 * 1024 * 1024 * 1024,
         "Actual: {} bytes",
         env.canister_memory_usage_bytes()
     );