On Wed, Mar 26, 2014 at 02:52:58PM -0500, James R. Leu wrote: > Hello, > > I'm using libvirt to build/run LXC instances. My LXC instances use > passthrough filesystem mounts. When I try to do large file systems > operations (ex tar or rsync) the file systems cache on the host > spikes and causes the OOM handler to run and kills processes > in the LXC. So it is specifically targetting processes inside the container and not the host ? If you run the same tar/rsync operations outside the container on the same filesystem, presumably you don't see the OOM killer behaviour ? > Has anyone else seen this? Is there a way around this? > At this point I'm resorting to running a cron job that dumps > the filesystem cache every 5 minutes. The result is the filesystem > cache on the host never grows too large and OOM never runs against > LXC processes. The obvious down fall is that I'm killing my filesystem > performance by duming the cache. This is the first I've heard of this problem and it certainly seems odd/bad. I wonder if there's some cgroup tunables that are being set badly, or that need to be set ? Or some global proc/sysfs settings Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :| _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
