Define batch size for token balance fetcher via runtime env var

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 ### Features
 
+- [#7439](https://github.com/blockscout/blockscout/pull/7439) - Define batch size for token balance fetcher via runtime env var
 - [#7298](https://github.com/blockscout/blockscout/pull/7298) - Add changes to support force email verification
 - [#7416](https://github.com/blockscout/blockscout/pull/7416) - Add option to disable reCAPTCHA
 - [#6694](https://github.com/blockscout/blockscout/pull/6694) - Add withdrawals support (EIP-4895)
@@ -12,6 +13,7 @@
 - [#7436](https://github.com/blockscout/blockscout/pull/7436) - TokenBalanceOnDemand ERC-1155 support
 
 ### Fixes
+
 - [#7391](https://github.com/blockscout/blockscout/pull/7391) - Fix: cannot read properties of null (reading 'value')
 
 - [#7377](https://github.com/blockscout/blockscout/pull/7377) - API v2 improvements

apps/indexer/lib/indexer/fetcher/token_balance.ex

@@ -24,12 +24,7 @@ defmodule Indexer.Fetcher.TokenBalance do
 
   @behaviour BufferedTask
 
-  @defaults [
-    flush_interval: 300,
-    max_batch_size: 100,
-    max_concurrency: 10,
-    task_supervisor: Indexer.Fetcher.TokenBalance.TaskSupervisor
-  ]
+  @default_max_batch_size 100
 
   @max_retries 3
 
@@ -50,7 +45,7 @@ defmodule Indexer.Fetcher.TokenBalance do
     end
 
     merged_init_opts =
-      @defaults
+      defaults()
       |> Keyword.merge(mergeable_init_options)
       |> Keyword.put(:state, state)
 
@@ -217,4 +212,13 @@ defmodule Indexer.Fetcher.TokenBalance do
       token_id: token_id
     }
   end
+
+  defp defaults do
+    [
+      flush_interval: 300,
+      max_batch_size: Application.get_env(:indexer, __MODULE__)[:batch_size] || @default_max_batch_size,
+      max_concurrency: 10,
+      task_supervisor: Indexer.Fetcher.TokenBalance.TaskSupervisor
+    ]
+  end
 end

config/runtime.exs

@@ -427,6 +427,9 @@ config :indexer, Indexer.Fetcher.PendingTransaction.Supervisor,
     System.get_env("ETHEREUM_JSONRPC_VARIANT") == "besu" ||
       ConfigHelper.parse_bool_env_var("INDEXER_DISABLE_PENDING_TRANSACTIONS_FETCHER")
 
+config :indexer, Indexer.Fetcher.TokenBalance,
+  batch_size: ConfigHelper.parse_integer_env_var("INDEXER_TOKEN_BALANCES_BATCH_SIZE", 100)
+
 config :indexer, Indexer.Fetcher.TokenBalanceOnDemand,
   threshold: ConfigHelper.parse_time_env_var("TOKEN_BALANCE_ON_DEMAND_FETCHER_THRESHOLD", "1h"),
   fallback_threshold_in_blocks: 500

docker-compose/envs/common-blockscout.env

@@ -110,6 +110,7 @@ INDEXER_DISABLE_INTERNAL_TRANSACTIONS_FETCHER=false
 # INDEXER_COIN_BALANCES_CONCURRENCY=
 # INDEXER_RECEIPTS_BATCH_SIZE=
 # INDEXER_RECEIPTS_CONCURRENCY=
+# INDEXER_TOKEN_BALANCES_BATCH_SIZE=
 # INDEXER_TX_ACTIONS_ENABLE=
 # INDEXER_TX_ACTIONS_MAX_TOKEN_CACHE_SIZE=
 # INDEXER_TX_ACTIONS_REINDEX_FIRST_BLOCK=

docker/Makefile

@@ -552,11 +552,15 @@ endif
 ifdef INDEXER_EMPTY_BLOCKS_SANITIZER_BATCH_SIZE
     BLOCKSCOUT_CONTAINER_PARAMS += -e 'INDEXER_EMPTY_BLOCKS_SANITIZER_BATCH_SIZE=$(INDEXER_EMPTY_BLOCKS_SANITIZER_BATCH_SIZE)'
 endif
+ifdef INDEXER_TOKEN_BALANCES_BATCH_SIZE
+    BLOCKSCOUT_CONTAINER_PARAMS += -e 'INDEXER_TOKEN_BALANCES_BATCH_SIZE=$(INDEXER_TOKEN_BALANCES_BATCH_SIZE)'
+endif
 ifdef INDEXER_REALTIME_FETCHER_MAX_GAP
     BLOCKSCOUT_CONTAINER_PARAMS += -e 'INDEXER_REALTIME_FETCHER_MAX_GAP=$(INDEXER_REALTIME_FETCHER_MAX_GAP)'
 endif
 ifdef INDEXER_INTERNAL_TRANSACTIONS_TRACER_TYPE
     BLOCKSCOUT_CONTAINER_PARAMS += -e 'INDEXER_INTERNAL_TRANSACTIONS_TRACER_TYPE=$(INDEXER_INTERNAL_TRANSACTIONS_TRACER_TYPE)'
+endif
 ifdef INDEXER_DISABLE_WITHDRAWALS_FETCHER
     BLOCKSCOUT_CONTAINER_PARAMS += -e 'INDEXER_DISABLE_WITHDRAWALS_FETCHER=$(INDEXER_DISABLE_WITHDRAWALS_FETCHER)'
 endif