Stop Using T2 Instances — They’re Quietly Increasing Your AWS Bill
I used to think T2 instances were the cheapest option on AWS.
They look affordable, they’re everywhere in tutorials, and honestly — most of us just start with them.
But after checking a few AWS bills closely, I realized something wasn’t adding up.
🤔 What’s Actually Going On with T2?
T2 instances run on a CPU credit system.
In simple terms:
- When your app is idle → you earn credits
- When CPU usage increases → you spend credits
At first, this seems like a smart system.
But here’s the part most people miss 👇
Where the Extra Cost Comes From
If your instance runs out of CPU credits, AWS doesn’t just slow things down.
If unlimited mode is enabled (which it often is by default), you start getting charged for extra CPU usage.
No clear warning. No obvious alert.
Just a slightly higher bill at the end of the month.
That’s exactly what happened to me.
Why I Switched to T3
T3 instances are basically the improved version of T2.
After switching, I noticed:
- More consistent performance
- Fewer surprises in billing
- Better overall value
They use newer hardware and handle CPU usage more efficiently.
T2 vs T3 (Simple View)
| Feature | T2 | T3 |
|---|---|---|
| CPU Handling | Credit-based | Smarter credits |
| Performance | Can drop | More stable |
| Pricing | Can spike | More predictable |
| Generation | Older | Newer |
When You Should Avoid T2
From experience, avoid T2 if:
- Your app has traffic spikes
- You're running anything close to production
- You don’t want unpredictable costs
Quick Tip
If you're currently using T2, check this:
Go to your billing dashboard → look for CPU credit charges
You might already be paying more than expected.
Final Thought
T2 isn’t “bad” — it’s just outdated for most real use cases.
T3 is usually the safer and smarter choice now.
🔗 Full article: [https://www.kubeblogs.com/why-t3-is-better-than-t2-for-most-aws-ec2-workloads/]
If you're into simple, practical DevOps tips, follow along 👍
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