# Monitoring and Health Checks

## Health Check Endpoint

```javascript
app.get('/health', async (req, res) => {
  const health = {
    uptime: process.uptime(),
    timestamp: Date.now(),
    status: 'ok'
  };
  
  try {
    await mongoose.connection.db.admin().ping();
    health.database = 'connected';
    
    await redisClient.ping();
    health.redis = 'connected';
    
    res.json(health);
  } catch (error) {
    health.status = 'error';
    health.error = error.message;
    res.status(503).json(health);
  }
});
```

## Track Response Time

```javascript
app.use((req, res, next) => {
  const start = Date.now();
  
  res.on('finish', () => {
    const duration = Date.now() - start;
    console.log(`${req.method} ${req.url} - ${duration}ms`);
    
    if (duration > 1000) {
      console.warn('Slow request detected');
    }
  });
  
  next();
});
```

## Key Takeaway

Implement health checks. Track response times. Alert on anomalies. Use monitoring services.

Monitor Node.js apps. Learn metrics and alerts.

Monitoring and Health Checks

Learn Node.js, NodeJS, and Node JS from basics to advanced concepts including async programming, APIs, and backend development.

Monitoring and Health Checks

Monitoring and Health Checks

Health Check Endpoint

Track Response Time

Key Takeaway

More on Node.js

Understanding Node.js Event Loop: A Complete Guide

Building RESTful APIs with Node.js and Express

Async/Await vs Promises in Node.js