Increase ES throttling rate in Ingestion Server (#3644)

ingestion_server/ingestion_server/indexer.py

@@ -46,6 +46,11 @@
 DATABASE_PASSWORD = config("DATABASE_PASSWORD", default="deploy")
 DATABASE_NAME = config("DATABASE_NAME", default="openledger")
 
+# See https://www.elastic.co/guide/en/elasticsearch/reference/8.8/docs-reindex.html#docs-reindex-throttle
+ES_FILTERED_INDEX_THROTTLING_RATE = config(
+    "ES_FILTERED_INDEX_THROTTLING_RATE", default=20_000, cast=int
+)
+
 # The number of database records to load in memory at once.
 DB_BUFFER_SIZE = config("DB_BUFFER_SIZE", default=100000, cast=int)
 
@@ -486,7 +491,7 @@ def create_and_populate_filtered_index(
         final alias used.
         """
         # Allow relying on the model-name-based alias by
-        # not suppliying `origin_index_suffix`
+        # not supplying `origin_index_suffix`
         source_index = (
             f"{model_name}-{origin_index_suffix}" if origin_index_suffix else model_name
         )
@@ -523,9 +528,7 @@ def create_and_populate_filtered_index(
             },
             slices="auto",
             wait_for_completion=True,
-            # 10k derived from in-production testing
-            # See https://github.com/WordPress/openverse/issues/2963
-            requests_per_second=15_000,
+            requests_per_second=ES_FILTERED_INDEX_THROTTLING_RATE,
             # Temporary workaround to allow the action to complete.
             request_timeout=48 * 3600,
         )