diff --git a/cmd/pg-fill/main.go b/cmd/pg-fill/main.go
index 204e697..7fc1b79 100644
--- a/cmd/pg-fill/main.go
+++ b/cmd/pg-fill/main.go
@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"log"
 	"os"
+	"path"
 	"time"
 
 	"pg/src/with"
@@ -30,8 +31,10 @@ func run(ctx context.Context) error {
 
 	return with.PSQL(ctx, *c, func(pg *sql.DB) error {
 		presently := func() int {
+			dbname := path.Base(*c)
+
 			var n2 int
-			if row := pg.QueryRowContext(ctx, `SELECT pg_total_relation_size('fill_with_data')/1024/1024`); row.Err() != nil {
+			if row := pg.QueryRowContext(ctx, `SELECT pg_database_size('`+dbname+`')/1024/1024`); row.Err() != nil {
 				return 0
 			} else if err := row.Scan(&n2); err != nil {
 				return 0