What Is Logging & Monitoring?

Handling an error is only half the job.
You also need to record and track it.

• Logging → Saving error details (what went wrong)
• Monitoring → Watching systems in real-time (when & how often it happens)

Think of it like this:
Error handling tells the user what happened
Logging tells the developer why it happened

Why It Is Important

• Helps in debugging issues faster
• Tracks frequent errors
• Improves system reliability
• Helps prevent future failures

Types of Logs

1. Error Logs → What failed
2. Access Logs → Who accessed API
3. Debug Logs → Detailed internal info

Technical Example

Here, the error is:

• Logged for developers
• Sent as response to user

Real-Life Examples

1. Bank Transaction History

Every transaction is recorded:

• Even failed payments are saved
• Bank can track what went wrong

Logging = Transaction history

2. CCTV Surveillance

A mall records everything:

• If something goes wrong
• You can check past footage

Logs = CCTV recordings

3. Fitness Tracker App

Tracks your activity continuously:

• Steps, heart rate, calories
• Alerts if something unusual happens

Monitoring = Real-time tracking system