single lxc container uses all host's memory

[ned]

I have a small lxc container with 1GB of RAM but a large disk partition which is 800GB of images which are synced with rsync. While the rsync is syncing data over network the container RAM usage is max 10%. The problem is that the host's memory usage is increasing over time and finally gets to 90%.

There is only one container running on the host with rsync running inside. There is only 1GB of cached memory on hosts that is shown with free -gh command.

When I reboot the lxc container the used memory on host starts dropping and os freed in matter of seconds.

The CT is an unprivileged container.

Any idea how to fix this?

# pveversion
pve-manager/4.4-13/7ea56165 (running kernel: 4.4.49-1-pve)

 

[wolfgang]

It is ok, this is the cache.

see
all the other thread in the forum if you are interested on memory usage.

 

[ned]

free -gh shows only 1GB of cache and 10GB of used memory. How can this be cache?

 

[dietmar]

free -gh shows only 1GB of cache and 10GB of used memory. How can this be cache?

Do you use ZFS?

 

[ned]

ext4 with lvm thin pool as storage for CTs.

 

[ned]

This helped

echo 2 > /proc/sys/vm/drop_caches