Checking your VPS's CPU, RAM, disk and network usage

When something is slow, the first step is finding out which resource ran out: CPU, memory, disk or network. There are two places to look.

1. The panel graphs

Under Services → your VPS → Go to server → Overview you have the history of:

CPU usage: the average across all cores.
Memory usage: the RAM in use.
Disk usage: how full it is.
Network usage and traffic: what goes in and out.

The graphs show history: if last night's stutters lined up with a CPU spike, there it is.

2. Inside the system: which process it is

Windows

Task Manager (Ctrl + Shift + Esc): the Processes tab shows who is consuming, Performance gives the overall picture.
Resource Monitor (type resmon in Run): the detail of which process reads or writes the disk and which one uses the network.

Linux

# Live processes (install it if missing: apt install htop)
htop

# Memory: look at "available", not "free"
free -h

# Disk space and the biggest folders
df -h
du -sh /* 2>/dev/null | sort -h | tail

On Linux it is normal to see little "free" memory: the system uses spare RAM as cache and releases it as soon as a program asks. The number that counts is available.

How to read it

What you see	What it usually means
CPU near 100% for long periods	A runaway process, or the plan is too small for what you run.
Memory maxed out	The system starts killing processes or crawls. On Windows, remember the system itself keeps about 4 GB.
Disk full (over 90%)	Piled-up logs or backups. Services fail when they cannot write. Check with `du` or File Explorer.
Everything normal but slow	It may be the network or something on our side. Open a ticket with what you saw.

If the usage is legitimate and constant, it is time to upgrade the plan: no migration needed.