High CPU Usage - isolating process

We recently experienced an hour long period of extremely high (90%+) CPU usage on our 16 core server which abide after about an hour. During this time no users reported any issues accessing Confluence and monitoring information from Wily indicated that response times were normal. For all intensive purposes the system was functional and within normal tolerances. However we would like to isolate what caused the CPU spike and were wondering if there is anyway to isolate which process would have caused this.



4 answers

0 votes
Joe Clark Atlassian Team May 02, 2012

Hi Christopher,

Do you know if the spike is coming from Confluence, or some other process on your system?

For Confluence, the best thing to do is, when the spike starts happening begin taking a bunch of thread dumps using the built-in admin tool spaced 5-10 seconds apart and then submit them to https://support.atlassian.com for analysis.

If the spike is happening outside of Confluence, you'll need to resort to other ways that are dependent on your operating system. For Windows, you could use the built in performance monitoring tools to plot CPU usage by process over time and then see which process is spiking.

For *nix systems, you can use the top command.

Hi Christopher,

We have submitted atlassian support ticket for this (https://getsupport.atlassian.com/servicedesk/customer/portal/14/CSP-202831) and monitoring very closely.




Confluence Cpu: 13.7% and back to normal after rebooted server.



I don`t have an answer, but we have exactly the same problem.

Twice in the last three weeks, the CPU went from 10% to about 30% for a couple of hours, and then spiked to 100% and never came down.

During this time, There were a lot of connections to the DB that were all idle, and usage in the application seemed unaffacted. Even collarborative editing was behaving correctly.

rebooting brought the CPU back to normal, but I don`t have a resolution, or explanation.



Suggest an answer

Log in or Sign up to answer
Community showcase
Published Mar 12, 2019 in Confluence

Confluence Admin Certification now $150 for Community Members

More and more people are building their careers with Atlassian, and we want you to be at the front of this wave! Important Dates Start the Certification Prep Course by 2 April 2019 Take your e...

1,082 views 2 13
Read article

Atlassian User Groups

Connect with like-minded Atlassian users at free events near you!

Find a group

Connect with like-minded Atlassian users at free events near you!

Find my local user group

Unfortunately there are no AUG chapters near you at the moment.

Start an AUG

You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs

Groups near you