diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index bec3b3800..680aaf504 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.36.6",
+    "version": "2.36.7",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",
diff --git a/packages/hydrooj/src/handler/judge.ts b/packages/hydrooj/src/handler/judge.ts
index 8be6c756e..0a18576ab 100644
--- a/packages/hydrooj/src/handler/judge.ts
+++ b/packages/hydrooj/src/handler/judge.ts
@@ -1,4 +1,5 @@
 import { ObjectID } from 'mongodb';
+import tx2 from 'tx2';
 import { JudgeResultBody, RecordDoc, TestCase } from '../interface';
 import difficultyAlgorithm from '../lib/difficulty';
 import { Logger } from '../logger';
@@ -19,6 +20,11 @@ import {
 import { sleep } from '../utils';
 
 const logger = new Logger('judge');
+const judgeCount = tx2.meter({
+    name: 'judge/min',
+    samples: 60,
+    timeframe: 120,
+});
 
 export async function postJudge(rdoc: RecordDoc) {
     if (typeof rdoc.input === 'string') return;
@@ -79,6 +85,7 @@ export async function next(body: JudgeResultBody) {
 }
 
 export async function end(body: JudgeResultBody) {
+    judgeCount.mark();
     if (body.rid) body.rid = new ObjectID(body.rid);
     let rdoc = await record.get(body.rid);
     if (!rdoc) return;