System Monitor

When to use

Use this skill when the user asks about:

• •CPU usage or load averages
• •Memory consumption or swap usage
• •Disk space
• •Running processes and resource hogs
• •System performance diagnostics

How to monitor

Quick overview

Use the system_info tool for an instant snapshot of CPU, memory, and disk.

Detailed CPU analysis

# Real-time CPU per core
mpstat -P ALL 1 3

# Top CPU consumers
ps aux --sort=-%cpu | head -20

Memory analysis

# Detailed memory breakdown
free -h
cat /proc/meminfo | head -20

# Top memory consumers
ps aux --sort=-%mem | head -20

Disk analysis

# Disk usage by mount point
df -h

# Largest directories
du -sh /* 2>/dev/null | sort -rh | head -10

Process investigation

Use the process_list tool, or for specific processes:

# Process tree
pstree -p

# Specific process details
ps -p <PID> -o pid,ppid,user,%cpu,%mem,vsz,rss,stat,start,command

Common issues

• •High CPU: Check for runaway processes with top or htop
• •Low memory: Look for memory leaks, consider swapoff -a && swapon -a
• •Disk full: Find large files with find / -size +100M -type f 2>/dev/null
• •High load average: Load > core count means saturation. Check I/O wait with iostat