Merge pull request #4834 from bjester/jit-setting

Add signal handler that runs postgres setting on connection created

Author: rtibbles

contentcuration/contentcuration/apps.py

@@ -8,6 +8,9 @@ class ContentConfig(AppConfig):
     name = 'contentcuration'
 
     def ready(self):
+        # Import signals
+        import contentcuration.signals  # noqa
+
         if settings.AWS_AUTO_CREATE_BUCKET and not is_gcs_backend():
             from contentcuration.utils.minio_utils import ensure_storage_bucket_public
             ensure_storage_bucket_public()

contentcuration/contentcuration/signals.py

@@ -0,0 +1,14 @@
+from django.db.backends.signals import connection_created
+from django.dispatch import receiver
+
+
+@receiver(connection_created)
+def set_jit(sender, connection, **kwargs):
+    """
+    Disable Just-In-Time compilation for PostgreSQL databases, at least until we can
+    optimize its use.
+    https://www.postgresql.org/docs/12/runtime-config-query.html#GUC-JIT
+    """
+    if connection.vendor == 'postgresql':
+        with connection.cursor() as cursor:
+            cursor.execute("SET jit = 'off';")