Assign DB weights for node runtime (#5703)

substrate/bin/node-template/runtime/src/lib.rs

@@ -34,7 +34,7 @@ pub use sp_runtime::{Permill, Perbill};
 pub use frame_support::{
 	StorageValue, construct_runtime, parameter_types,
 	traits::Randomness,
-	weights::Weight,
+	weights::{Weight, RuntimeDbWeight},
 };
 
 /// Importing a template pallet
@@ -126,6 +126,12 @@ parameter_types! {
 	pub const AvailableBlockRatio: Perbill = Perbill::from_percent(75);
 	pub const MaximumBlockLength: u32 = 5 * 1024 * 1024;
 	pub const Version: RuntimeVersion = VERSION;
+	/// This probably should not be changed unless you have specific
+	/// disk i/o conditions for the node.
+	pub const DbWeight: RuntimeDbWeight = RuntimeDbWeight {
+		read: 60_000_000, // ~0.06 ms = ~60 µs
+		write: 200_000_000, // ~0.2 ms = 200 µs
+	};
 }
 
 impl system::Trait for Runtime {
@@ -154,7 +160,7 @@ impl system::Trait for Runtime {
 	/// Maximum weight of each block.
 	type MaximumBlockWeight = MaximumBlockWeight;
 	/// The weight of database operations that the runtime can invoke.
-	type DbWeight = ();
+	type DbWeight = DbWeight;
 	/// Maximum size of all encoded transactions (in bytes) that are allowed in one block.
 	type MaximumBlockLength = MaximumBlockLength;
 	/// Portion of the block weight that is available to all normal transactions.