Avoid long heavy tasks in the GraphQL service

CHANGELOG.md

@@ -6,6 +6,15 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+### Changed
+
+- [2334](https://github.com/FuelLabs/fuel-core/pull/2334): Prepare the GraphQL service for the switching to `async` methods.
+- [2337](https://github.com/FuelLabs/fuel-core/pull/2337): Updated all pagination queries to work with the async stream instead of the sync iterator.
+- [2340](https://github.com/FuelLabs/fuel-core/pull/2340): Avoid long heavy tasks in the GraphQL service by splitting work into batches.
+
+#### Breaking
+- [2337](https://github.com/FuelLabs/fuel-core/pull/2337): The maximum number of processed coins from the `coins_to_spend` query is limited to `max_inputs`.
+
 ## [Version 0.39.0]
 
 ### Added

benches/benches/transaction_throughput.rs

@@ -89,6 +89,7 @@ where
             test_builder.trigger = Trigger::Never;
             test_builder.utxo_validation = true;
             test_builder.gas_limit = Some(10_000_000_000);
+            test_builder.block_size_limit = Some(1_000_000_000_000);
 
             // spin up node
             let transactions: Vec<Transaction> =

bin/fuel-core/src/cli/run.rs

@@ -488,6 +488,7 @@ impl Command {
         let config = Config {
             graphql_config: GraphQLConfig {
                 addr,
+                database_batch_size: graphql.database_batch_size,
                 max_queries_depth: graphql.graphql_max_depth,
                 max_queries_complexity: graphql.graphql_max_complexity,
                 max_queries_recursive_depth: graphql.graphql_max_recursive_depth,

bin/fuel-core/src/cli/run/graphql.rs

@@ -12,6 +12,10 @@ pub struct GraphQLArgs {
     #[clap(long = "port", default_value = "4000", env)]
     pub port: u16,
 
+    /// The size of the batch fetched from the database by GraphQL service.
+    #[clap(long = "graphql-database-batch-size", default_value = "100", env)]
+    pub database_batch_size: usize,
+
     /// The max depth of GraphQL queries.
     #[clap(long = "graphql-max-depth", default_value = "16", env)]
     pub graphql_max_depth: usize,

crates/client/assets/schema.sdl

@@ -938,7 +938,7 @@ type Query {
 		"""
 		owner: Address!,
 		"""
-		The list of requested assets` coins with asset ids, `target` amount the user wants to reach, and the `max` number of coins in the selection. Several entries with the same asset id are not allowed.
+		The list of requested assets` coins with asset ids, `target` amount the user wants to reach, and the `max` number of coins in the selection. Several entries with the same asset id are not allowed. The result can't contain more coins than `max_inputs`.
 		"""
 		queryPerAsset: [SpendQueryElementInput!]!,
 		"""