diff --git a/prisma/migrations/20240109123840_add_monitor_data_created_at_index/migration.sql b/prisma/migrations/20240109123840_add_monitor_data_created_at_index/migration.sql
new file mode 100644
index 0000000..2e4357d
--- /dev/null
+++ b/prisma/migrations/20240109123840_add_monitor_data_created_at_index/migration.sql
@@ -0,0 +1,2 @@
+-- CreateIndex
+CREATE INDEX "MonitorData_createdAt_idx" ON "MonitorData"("createdAt");
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 9d4ec63..5ff5da2 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -292,6 +292,8 @@ model MonitorData {
   createdAt DateTime @default(now()) @db.Timestamptz(6)
 
   monitor Monitor @relation(fields: [monitorId], references: [id], onUpdate: Cascade, onDelete: Cascade)
+
+  @@index([createdAt])
 }
 
 // Use for record latest monitor status, for example tls status
diff --git a/src/server/model/monitor/index.ts b/src/server/model/monitor/index.ts
index c115ca2..cf6f1a9 100644
--- a/src/server/model/monitor/index.ts
+++ b/src/server/model/monitor/index.ts
@@ -37,6 +37,9 @@ export function getMonitorData(
       value: true,
       createdAt: true,
     },
+    orderBy: {
+      createdAt: 'asc',
+    },
   });
 }