diff --git a/sapp/bulk_saver.py b/sapp/bulk_saver.py
index 98a4a44a..6472ade0 100644
--- a/sapp/bulk_saver.py
+++ b/sapp/bulk_saver.py
@@ -7,7 +7,7 @@
 """
 
 import logging
-from typing import Any, Callable, Dict, Optional
+from typing import Any, Callable, Dict, List, Optional, Type
 
 from sqlalchemy.dialects.mysql import insert as mysql_insert
 from sqlalchemy.dialects.sqlite import insert as sqlite_insert
@@ -38,7 +38,7 @@ class BulkSaver:
     """Stores new objects created within a run and bulk save them"""
 
     # order is significant, objects will be saved in this order.
-    SAVING_CLASSES_ORDER = [
+    DEFAULT_SAVING_CLASSES_ORDER = [
         SharedText,
         Issue,
         IssueInstanceFixInfo,
@@ -62,18 +62,23 @@ class BulkSaver:
     BATCH_SIZE = 30000
 
     def __init__(
-        self, primary_key_generator: Optional[PrimaryKeyGenerator] = None
+        self,
+        primary_key_generator: Optional[PrimaryKeyGenerator] = None,
+        extra_saving_classes: Optional[List[Type[object]]] = None,
     ) -> None:
         self.primary_key_generator: PrimaryKeyGenerator = (
             primary_key_generator or PrimaryKeyGenerator()
         )
+        self.saving_classes_order: List[Type[object]] = (
+            extra_saving_classes or []
+        ) + self.DEFAULT_SAVING_CLASSES_ORDER
         self.saving: Dict[str, Any] = {}
-        for cls in self.SAVING_CLASSES_ORDER:
+        for cls in self.saving_classes_order:
             self.saving[cls.__name__] = []
 
     # pyre-fixme[2]: Parameter must be annotated.
     def add(self, item) -> None:
-        assert item.model in self.SAVING_CLASSES_ORDER, (
+        assert item.model in self.saving_classes_order, (
             "%s should be added with session.add()" % item.model.__name__
         )
         self.saving[item.model.__name__].append(item)
@@ -81,7 +86,7 @@ def add(self, item) -> None:
     # pyre-fixme[2]: Parameter must be annotated.
     def add_all(self, items) -> None:
         if items:
-            assert items[0].model in self.SAVING_CLASSES_ORDER, (
+            assert items[0].model in self.saving_classes_order, (
                 "%s should be added with session.add_all()" % items[0].model.__name__
             )
             self.saving[items[0].model.__name__].extend(items)
@@ -96,7 +101,7 @@ def save_all(
     ) -> None:
         saving_classes = [
             cls
-            for cls in self.SAVING_CLASSES_ORDER
+            for cls in self.saving_classes_order
             if len(self.saving[cls.__name__]) != 0
         ]
 
@@ -276,6 +281,6 @@ def add_trace_frame_annotation_trace_frame_assoc(
 
     def dump_stats(self) -> str:
         stat_str = ""
-        for cls in self.SAVING_CLASSES_ORDER:
+        for cls in self.saving_classes_order:
             stat_str += "%s: %d\n" % (cls.__name__, len(self.saving[cls.__name__]))
         return stat_str
diff --git a/sapp/db_support.py b/sapp/db_support.py
index d4f42b25..0499d2b8 100644
--- a/sapp/db_support.py
+++ b/sapp/db_support.py
@@ -361,7 +361,14 @@ def reserve(
                 count = item_counts[cls.__name__]
             else:
                 count = 1
-            self._reserve_id_range(session, cls, count)
+
+            if count > 0:
+                self._reserve_id_range(session, cls, count)
+            elif count == 0:
+                # Don't bother locking rows if there's nothing to reserve
+                pass
+            else:
+                raise ValueError(f"{cls.__name__} count must be >= 0")
 
         return self
 
diff --git a/sapp/pipeline/database_saver.py b/sapp/pipeline/database_saver.py
index c70190b2..0f8a3e0f 100644
--- a/sapp/pipeline/database_saver.py
+++ b/sapp/pipeline/database_saver.py
@@ -7,7 +7,7 @@
 
 import collections
 import logging
-from typing import Optional, Tuple
+from typing import List, Optional, Tuple, Type
 
 from ..bulk_saver import BulkSaver
 from ..db import DB
@@ -40,13 +40,16 @@ def __init__(
         database: DB,
         primary_key_generator: Optional[PrimaryKeyGenerator] = None,
         dry_run: bool = False,
+        extra_saving_classes: Optional[List[Type[object]]] = None,
     ) -> None:
         self.dbname: str = database.dbname
         self.database = database
         self.primary_key_generator: PrimaryKeyGenerator = (
             primary_key_generator or PrimaryKeyGenerator()
         )
-        self.bulk_saver = BulkSaver(self.primary_key_generator)
+        self.bulk_saver = BulkSaver(
+            self.primary_key_generator, extra_saving_classes=extra_saving_classes
+        )
         self.dry_run = dry_run
         self.graph: TraceGraph
         self.summary: Summary
@@ -116,7 +119,6 @@ def _save(self) -> RunSummary:
                             run_label=self.summary.get("meta_run_child_label", None),
                         )
                     )
-                session.add_all(self.summary.get("run_attributes", []))
                 session.commit()
 
                 run_id = self.summary["run"].id.resolved()