Related

Join the DigitalOcean Community Community

Join 1M+ other developers and:

  • Get help and share knowledge in Q&A
  • Subscribe to topics of interest
  • Get courses & tools that help you grow as a developer or small business owner
 Join Now
Bandwidth Monitoring Alert firing incorrectly Question Question
My droplet has no bandwidth data in its Graphs whatsoever. Why is that? Question Question

Question

How does my CPU usage suddenly peak ?

Posted April 18, 2019 2.8k views
MonitoringUbuntu 18.04

Hi,

Ubui am running an ubuntu 18.10 on a Droplet with enabled monitoring and have set it to notify me when CPU usage is higher than 80% for testing purposes.

What i noticed is that there was a sudden peak of 89% CPU Usage while the machine is powered on however not in use so i wonder if there is a way for me to know what processes have exploited CPU %?

Is this normal behaviour ?

Respect

Add a comment
timmys00
By:
timmys00

Related

Join the DigitalOcean Community Community

Join 1M+ other developers and:

  • Get help and share knowledge in Q&A
  • Subscribe to topics of interest
  • Get courses & tools that help you grow as a developer or small business owner
 Join Now
Bandwidth Monitoring Alert firing incorrectly Question Question
My droplet has no bandwidth data in its Graphs whatsoever. Why is that? Question Question

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

×
Submit an Answer
2 answers
jarland April 18, 2019

Greetings!

It’s hard to say what it could be, it’s not particularly unusual. Perhaps someone tried a strong and distributed brute force attack against a public facing service. Perhaps you have a web server running and a crawler came along to hammer away at it.

If I ever need to get down to that kind of level and find out what happened at a specific time, I usually prefer syssnap to do the job. It’s made by cPanel but by no means requires their other software to be installed.

https://github.com/CpanelInc/tech-SysSnapv2

Jarland

Reply Report
  • timmys00 April 18, 2019

    Thanks for your answer and suggestions Jarland,

    the situation is i have installed only GO lang with only 1 hello world printiln script and Yarn on that droplet.

    I was not using the machine and was not connected to it during the time when i received the alert. It says that local disk usage(read/write) was increased and droplet memory is up for 10%.

    I dont know if some automatic updates are enabled by default when instantiating a droplet, but i would like to clarify this behavior so i would not get surprised when i need to run monitoring for a more serious solution.

    Any guidance is appreciated,
    My best

    Reply Report
luckyl01810 October 5, 2021

I had the same problem now I found a solution I hope it will work for you.
actually, someone was attacking with a brute force attack on my website so why my website was down and the graph shows CPU 100% usage.

First of all, check which application takes much usage so enter the command “top” it will show the real-time CPU usage. in my case, PHP-fpm was taking 95% usage.

Now you have to check your Nginx log file.
“sudo tail -f /var/log/nginx/access.log”
it will show the error or bad gateway access details.. now you have to copy the IP address which is repeated a lot of times you have to block it.

You can block IP by using this command “iptables -I INPUT -s 35.186.156.199 -j DROP”

I hope this issue will be resolved.

Reply Report

Related

Looking for something else?

Ask a new question Search for more help