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Re: [Xen-users] dom0 - oom-killer - memory leak somewhere ?

On 11/10/2011 4:56 AM, Adrien Urban wrote:

I work in a hosting company, we have tens of Xen dom0 running just fine, but unfortunately we do have a few that get out of control.

Reported behaviour :
- dom0 uses more and more memory
- no process can be found using that memory
- at some point, oom killer kicks in, and kills everything, until even ssh the box becomes hard
- when there is really no more process to kill, it crashes even more, and we are forced to reboot

Configuration summary :
- dom0 with debian/stable, xen 4.0.1
- 512MB, or up to 2GB after some crash


Were you ever able to determine what was using the memory? I had several machines at the same location all enter this state this morning at the same time, and I can't find any clues as to what's exhausting the memory, just as you couldn't. The circumstances suggest that some sort of attack or network event was involved, but I'm not seeing significant traffic levels. One of the machines was brand new (very latest Xen 4.1, very latest xen/next-2.6.32) and had no activity otherwise. It's very puzzling.

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