diff --git a/db/patch11.sql b/db/patch11.sql
new file mode 100644
index 000000000..c07d62981
--- /dev/null
+++ b/db/patch11.sql
@@ -0,0 +1,10 @@
+-- You should not modify if this have pushed to Github, unless it does serious wrong with the db.
+BEGIN TRANSACTION;
+
+-- For sendHeartbeatList
+CREATE INDEX monitor_time_index ON heartbeat (monitor_id, time);
+
+-- For sendImportantHeartbeatList
+CREATE INDEX monitor_important_time_index ON heartbeat (monitor_id, important,time);
+
+COMMIT;