The monitoring software we use has been flagged a box that serves two apps:

  • Confluence (xms: 1 GB, xmx: 2 GB)
  • JIRA (xms: 1 GB, xmx: 1 GB)

These are the only two applications on the box; nothing else but it is a VM.

Server Config

  • VM (VMWare)
  • RedHat EL 5
  • 2 GB memory allocated

The Graph

alt text What's really weird to me is that peak times should be between 8 AM and 5 PM, but on Thursday morning, from 1 AM to 8 AM. Not as bad, but Friday is similar--swap is being used though there's no load I'd expect at that time.


  • Our servers fetch and apply updates via cron-apt during the wee hours (4AM). Anything like that going on?
    – nedm
    Oct 1 '10 at 21:55
  • @nedm: Not applicable to us, as far as I know. Last I heard, the VM hasn't been patched in months. I don't think it's been in use for 9 months yet.
    – OMG Ponies
    Oct 1 '10 at 21:57

Run atop in daemon mode:

atop -a -w /var/log/atop.log 600

let it log for the night, read the log afterwards with

atop -r /var/log/atop.log

you can scroll forward and backward with t and T, memory details are shown after pressing m

  • Sorry for the delay. We determined that the applications were delegated more RAM than the system had, so it was increased and things are fine now--no more memory/swap warnings.
    – OMG Ponies
    Oct 10 '10 at 15:43

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.