@@ -33,8 +33,9 @@ }
 	defer root.Close()
 
 	store, err := storage.New(&storage.Options{
-		Root:   root,
-		Logger: logger.Named("store"),
+		LowMemory: cfg.Importer.LowMemory,
+		Root:      root,
+		Logger:    logger.Named("store"),
 	})
 	if err != nil {
 		return fault.Wrap(err, fmsg.With("Failed to create store"))

@@ -39,8 +39,9 @@ }
 	defer root.Close()
 
 	store, err := storage.New(&storage.Options{
-		Root:   root,
-		Logger: logger.Named("store"),
+		LowMemory: cfg.Importer.LowMemory,
+		Root:      root,
+		Logger:    logger.Named("store"),
 	})
 	if err != nil {
 		return fault.Wrap(err, fmsg.With("Failed to create store"))

@@ -36,8 +36,9 @@ b.Fatal(err)
 	}
 
 	store, err := storage.New(&storage.Options{
-		Root:   tmp,
-		Logger: logger.Named("storage"),
+		LowMemory: true,
+		Root:      tmp,
+		Logger:    logger.Named("storage"),
 	})
 	if err != nil {
 		b.Fatal(err)

@@ -20,9 +20,10 @@
 var BatchSize = 10000
 
 type Options struct {
-	Replace bool
-	Root    *file.Root
-	Logger  *log.Logger
+	Replace   bool
+	LowMemory bool
+	Root      *file.Root
+	Logger    *log.Logger
 }
 
 type Store struct {
@@ -53,11 +54,18 @@ path := opts.Root.JoinPath(filename)
 	bb, err := storm.Open(path,
 		storm.Codec(gob.Codec),
 		storm.BoltOptions(0o600, &bbolt.Options{
-			Timeout: 1 * time.Second,
+			FreelistType:   bbolt.FreelistMapType,
+			NoFreelistSync: true,
+			NoGrowSync:     true,
+			Timeout:        1 * time.Second,
 		}),
 	)
 	if err != nil {
 		return nil, fault.Wrap(err, fmsg.With("failed to open database"))
+	}
+
+	if !opts.LowMemory {
+		bb.Bolt.AllocSize = 100 * 1024 * 1024
 	}
 
 	return &Store{