Update the sample config.

Author: clokep

Diff for: docs/sample_config.yaml

@@ -2459,10 +2459,9 @@ opentracing:
 #  typing: worker1
 
 # The worker that is used to run background tasks (e.g. cleaning up expired
-# data). This should be one of the workers from `instance_map`. If not
-# provided this defaults to the main process.
+# data). If not provided this defaults to the main process.
 #
-#run_background_tasks: worker1
+#run_background_tasks_on: worker1
 
 
 # Configuration for Redis when using workers. This *must* be enabled when

Diff for: synapse/config/workers.py

@@ -182,10 +182,9 @@ def generate_config_section(self, config_dir_path, server_name, **kwargs):
         #  typing: worker1
 
         # The worker that is used to run background tasks (e.g. cleaning up expired
-        # data). This should be one of the workers from `instance_map`. If not
-        # provided this defaults to the main process.
+        # data). If not provided this defaults to the main process.
         #
-        #run_background_tasks: worker1
+        #run_background_tasks_on: worker1
         """
 
     def read_arguments(self, args):