Add config settings for background update parameters (#11980)

docs/sample_config.yaml

@@ -2735,3 +2735,35 @@ redis:
   # Optional password if configured on the Redis instance
   #
   #password: <secret_password>
+
+
+## Background Updates ##
+
+# Background updates are database updates that are run in the background in batches.
+# The duration, minimum batch size, default batch size, whether to sleep between batches and if so, how long to
+# sleep can all be configured. This is helpful to speed up or slow down the updates.
+#
+background_updates:
+    # How long in milliseconds to run a batch of background updates for. Defaults to 100. Uncomment and set
+    # a time to change the default.
+    #
+    #background_update_duration_ms: 500
+
+    # Whether to sleep between updates. Defaults to True. Uncomment to change the default.
+    #
+    #sleep_enabled: false
+
+    # If sleeping between updates, how long in milliseconds to sleep for. Defaults to 1000. Uncomment
+    # and set a duration to change the default.
+    #
+    #sleep_duration_ms: 300
+
+    # Minimum size a batch of background updates can be. Must be greater than 0. Defaults to 1. Uncomment and
+    # set a size to change the default.
+    #
+    #min_batch_size: 10
+
+    # The batch size to use for the first iteration of a new background update. The default is 100.
+    # Uncomment and set a size to change the default.
+    #
+    #default_batch_size: 50