Update log message in WithDBSettingsBase._load_experiment_and_generat…

…ion_strategy (#2287)

Summary:
Pull Request resolved: #2287

The previous message would make me think that the trials were being loaded after the log as opposed to being loaded as part of the experiment. Updated the message to clear the confusion.

Reviewed By: Balandat

Differential Revision: D55044629

fbshipit-source-id: a6117cddf0f70ffa77645678e7545252db518701

ax/service/utils/with_db_settings_base.py

@@ -257,10 +257,10 @@ def _load_experiment_and_generation_strategy(
         )
         if not isinstance(experiment, Experiment):
             raise ValueError("Service API only supports `Experiment`.")
+        num_trials = len(experiment.trials)
         logger.info(
-            f"Loaded experiment {experiment_name} in "
-            f"{_round_floats_for_logging(time.time() - start_time)} seconds, "
-            f"loading trials in mini-batches of {LOADING_MINI_BATCH_SIZE}."
+            f"Loaded experiment {experiment_name} & {num_trials} trials in "
+            f"{_round_floats_for_logging(time.time() - start_time)} seconds."
         )
 
         try: