How to Detect High CPU or Memory Usage on Oracle Linux Servers

Introduction

High CPU or memory usage can slow down Oracle Database. Linux provides commands to monitor system performance in real-time.

Commands:

1. Check CPU Usage

top

Look for oracle processes consuming high CPU.

2. Check Memory Usage

free -h

3. Check Per-Process Resource Usage

ps -eo pid,ppid,cmd,%mem,%cpu --sort=-%cpu | head

4. Optional: Monitor Logs

Check /var/log/messages for system errors or OOM events.

Conclusion

Monitoring CPU and memory helps DBAs prevent slowdowns, crashes, or database outages.