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From "ASF subversion and git services (JIRA)" <>
Subject [jira] [Commented] (CLOUDSTACK-8678) OOM Kills Guests
Date Sat, 05 Sep 2015 07:14:46 GMT


ASF subversion and git services commented on CLOUDSTACK-8678:

Commit 1077f86144a190bac48e72f999bf9430da21109a in cloudstack's branch refs/heads/master from
[;h=1077f86 ]

Merge pull request #766 from kmccormick/CLOUDSTACK-8678

CLOUDSTACK-8678: Reserve RAM for KVM host OSUse host.reserved.ram.mb agent property to modify
total system RAM
before reporting to management server.

* pr/766:
  CLOUDSTACK-8678: Reserve RAM for KVM host OS

Signed-off-by: Remi Bergsma <>

> OOM Kills Guests
> ----------------
>                 Key: CLOUDSTACK-8678
>                 URL:
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: Hypervisor Controller, KVM
>    Affects Versions: 4.4.2
>         Environment: Intel Xeon Quad Core CPU L5520 @ 2.27GHz
> 98 GB RAM
> Ubuntu 14.04
> Running Cloustack 4.4.2
>            Reporter: Josh Harshman
>            Assignee: Daan Hoogland
>            Priority: Critical
> We have several KVM nodes running Cloudstack 4.4.2. Sometimes an instance with X amount
of RAM provisioned will be started on a host that has X+a small amount of RAM free. The kernel
OOM killer will eventually kill off the instance. Has anyone else seen this behavior, is there
a way to reserve RAM for use by the host instead of by Cloudstack? Looking at the numbers
in the database and the logs, Cloudstack is trying to use 100% of the RAM on the host.
> Any thoughts would be appreciated.
> Thank you,

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