> For the complete documentation index, see [llms.txt](https://docs.clouduxe.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.clouduxe.com/vps-and-dedicated-servers/resource-usage-monitoring-guide.md).

# Resource Usage Monitoring Guide

> 💡 **Why monitor resources?**\
> Monitoring helps you **detect problems early**, optimize performance, and plan for scaling.

***

### Key Metrics to Monitor

| Resource         | Metric Example                      | Why It Matters                       |
| ---------------- | ----------------------------------- | ------------------------------------ |
| **CPU**          | Load average, process utilization   | Detect overload or runaway processes |
| **Memory (RAM)** | Used vs. free memory                | Prevent crashes due to memory leaks  |
| **Disk**         | Space usage, IOPS, read/write speed | Avoid downtime from full disks       |
| **Network**      | Bandwidth, packet loss, latency     | Identify bottlenecks or DDoS attacks |

***

### Step 1: Monitoring CPU Usage

#### Check Load Average

```bash
uptime
```

Output example:

```
16:22:07 up 10 days,  3:44,  2 users,  load average: 0.25, 0.40, 0.35
```

* **1 minute, 5 minutes, 15 minutes average load**
* If load > CPU cores, server may be overloaded.

#### Real-Time CPU Monitoring

```bash
htop
```

Interactive tool showing per-core usage and top processes.

> ⚠️ **Warning**\
> If your CPU usage is consistently above 80%, consider **optimizing applications or upgrading resources**.

***

### Step 2: Monitoring Memory Usage

#### Check Memory Stats

```bash
free -h
```

Output:

```
              total        used        free      shared  buff/cache   available
Mem:           8.0G        2.1G        3.2G        256M        2.7G        5.4G
```

#### Real-Time Memory Usage

```bash
vmstat 2
```

Updates memory and swap usage every 2 seconds.

***

### Step 3: Monitoring Disk Usage

#### Check Disk Space

```bash
df -h
```

Shows available and used space:

```
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1       80G   40G   36G  53% /
```

#### Find Large Directories

```bash
du -sh * | sort -h
```

Lists directories by size in current path.

#### Disk I/O Monitoring

```bash
iostat -xz 1
```

Displays read/write performance and bottlenecks.

> 💡 **Tip**\
> Keep at least **20% disk space free** to avoid fragmentation and performance issues.

***

### Step 4: Monitoring Network Usage

#### Check Bandwidth in Real-Time

```bash
iftop
```

Shows incoming and outgoing traffic by IP.

#### Check Network Errors

```bash
netstat -i
```

Displays dropped packets and errors.

#### Advanced Monitoring

```bash
nload
```

Visual interface showing bandwidth usage.

***

### Step 5: Using Monitoring Tools

For ongoing monitoring, install tools for visibility:

| Tool         | Function                       |
| ------------ | ------------------------------ |
| `htop`       | CPU, memory usage in real time |
| `iotop`      | Disk I/O usage                 |
| `iftop`      | Bandwidth monitoring           |
| `glances`    | All-in-one resource monitor    |
| `fastnetmon` | DDoS detection                 |

Example install (Ubuntu/Debian):

```bash
sudo apt install htop iotop iftop glances
```

***

### Step 6: Advanced Monitoring with Prometheus + Grafana

For long-term tracking and visualization:

1. Install **Prometheus** on your server.
2. Use **Node Exporter** to collect metrics.
3. Connect Prometheus to **Grafana**.
4. Create dashboards for CPU, RAM, disk, and network usage.

> 🚀 **Pro Tip**\
> Clouduxe offers **preconfigured Grafana dashboards** for real-time monitoring of your VPS.

***

### Step 7: Setting Alerts

Monitoring is incomplete without alerts.

Use **Prometheus Alertmanager** or third-party tools (like UptimeRobot, PagerDuty) to notify you when thresholds are exceeded.

Example thresholds:

* CPU > 90% for 5 minutes
* Memory usage > 80%
* Disk usage > 85%
* Network packet loss > 5%

***

### Troubleshooting High Resource Usage

| Issue                | Possible Solution                   |
| -------------------- | ----------------------------------- |
| High CPU load        | Check processes with `top` / `htop` |
| Memory leak          | Restart service, optimize code      |
| Disk usage at 100%   | Delete logs, rotate backups         |
| High network traffic | Check for DDoS, use firewall rules  |

***

### Conclusion

Monitoring **resource usage** is a critical part of server management. By regularly checking CPU, memory, disk, and network utilization, you can:

* Detect issues before they become critical
* Optimize server performance
* Plan scaling efficiently
* Protect against attacks

> ✅ **Next Step**\
> Integrate monitoring into your **Clouduxe VPS Hosting** to get proactive alerts and insights.