[lvs-users] High memory usage

Jesper Dangaard Brouer jbrouer at redhat.com
Wed Sep 18 10:47:58 BST 2013


On Fri, 30 Aug 2013 16:30:12 +0300
R G <electronbeastie at yahoo.com> wrote:

> Hello,
> 
> After setting up LVS with Direct Routing, I noticed that even there is 
> absolutely no traffic passing through the LB,
> the memory usage grows continuously until the whole RAM is filled.
> 
> Doing some investigations in /proc/slabinfo, I noticed that the RAM is 
> used by "dentry":
> dentry            18933940 18933940    192   20    1 : tunables 120   
> 60    8 : slabdata 946697 946697      0

This is the disk caching, this is normal, don't worry!
Nothing is wrong... move along please ;-)

 
> The memory can be freed using:
> echo 2 > /proc/sys/vm/drop_caches
> 
> As soon as the memory is cleared, it starts filling up again.
> 
> I find this behavior very odd and concerning. If anybody has experienced 
> something similar, or has any ideas, please share.
> 
> OS: CentOS 6.4 64bit
> kernel: 2.6.32-358.18.1.el6.x86_64
> latest patches applied via yum update
> 
> Thank you!
> Radu


-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Sr. Network Kernel Developer at Red Hat
  Author of http://www.iptv-analyzer.org
  LinkedIn: http://www.linkedin.com/in/brouer



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