In this article we explain the 4 concrete metrics that indicate it's time to upgrade your hosting.
1. CPU Usage Consistently Above 70%
The most important upgrade signal is CPU usage.
| CPU Usage | Status |
|---|---|
| 0–40% | Normal |
| 40–70% | Borderline |
| 70–90% | Time to upgrade |
| 90%+ | Critical |
Rule:
If CPU usage is consistently above 70%, it's time to upgrade hosting.
2. RAM Usage Consistently Above 80%
When RAM fills up, the site throws 500 errors.
| RAM Usage | Status |
|---|---|
| 0–50% | Normal |
| 50–80% | Borderline |
| 80–90% | Upgrade |
| 90%+ | Critical |
3. TTFB Exceeds 500 ms
TTFB reflects server performance.
| TTFB | Status |
|---|---|
| <200 ms | Excellent |
| 200–400 ms | Good |
| 400–600 ms | Borderline |
| 600+ ms | Upgrade |
| 1000+ ms | Critical |
4. Site Traffic Has Doubled
An increase in traffic raises hosting requirements.
| Monthly Traffic | Hosting |
|---|---|
| 0–10K | Shared |
| 10–50K | VPS |
| 50–200K | Cloud |
| 200K+ | Cloud / Dedicated |
Bonus: Upgrade Is Essential If You're Seeing These Errors
| Error | Cause |
|---|---|
| 503 | CPU insufficient |
| 500 | RAM insufficient |
| 508 | Hosting limit |
What Happens If You Don't Upgrade?
| Problem | Consequence |
|---|---|
| Slow site | SEO ranking drops |
| Site goes down | Loss of sales |
| Error codes | Loss of trust |
| Cart abandonment | Revenue loss |
When Should You Switch to Which Hosting?
| Current | When to Upgrade | New |
|---|---|---|
| Shared | 10–20K traffic | VPS |
| VPS | 50–100K traffic | Cloud |
| Cloud | 200K+ traffic | Dedicated |
Conclusion
The decision to upgrade hosting is based on these 4 metrics:
- CPU usage
- RAM usage
- TTFB
- Traffic increase
If 2 of these 4 metrics are at a critical level, it's time to upgrade.