[lxc-users] High Memory utilization with lxc containers

[Ajith Adapa]

I mean there is around 1.5GB RAM freely available when I just start
the containers.

KiB Mem:   2025228 total,   593388 used,  1431840 free,    36708 buffers
KiB Swap:  2129916 total,        0 used,  2129916 free.   394116 cached Mem

Regards,
Ajith

On Sat, Jul 5, 2014 at 3:33 PM, Ajith Adapa <ajith.adapa at gmail.com> wrote:
> Hi,
>
> I am not exactly sure if LXC is the reason but atleast I am seeing
> that memory is exhausted after running lxc containers for more than a
> day.
>
> Setup information:
> Guest VM running Fedora 20 with 2GB RAM and 4 logical cores assigned.
> It is only used for running LXC containers. lxc version 1.0.3
>
> I have 4 containers created using the default templates. When I
> started all the containers the amount of free ram available is around
> 500MB (As per the output from top).
>
> After 24 hours, I have got only 100MB free as per top command output.
> I am not starting any process inside lxc-containers after starting
> them.
>
> # lxc-ls -f
> NAME        STATE    IPV4         IPV6  AUTOSTART
> -------------------------------------------------
> centostest  RUNNING  10.12.4.101  -     NO
> debiantest  RUNNING  10.12.4.117  -     NO
> f19i686     RUNNING  10.12.4.122  -     NO
> ubuntu      RUNNING  10.12.4.131  -     NO
>
> As per below output systemd-journald seems the culprit but I am not sure why.
>
> # ps -eo pmem,pcpu,vsize,pid,cmd | sort -k 1 -nr | head -5
>  2.7  0.0 124036  1997 /usr/lib/systemd/systemd-journald
>  1.2  0.0 325168   558 /usr/bin/python /usr/sbin/firewalld --nofork --nopid
>  0.6  0.0 511304  1348 /usr/lib/polkit-1/polkitd --no-debug
>  0.6  0.0 102340  1342 /sbin/dhclient -H blrlt1144 -1 -q -lf
> /var/lib/dhclient/dhclient--virbr0.lease -pf
> /var/run/dhclient-virbr0.pid virbr0
>  0.4  0.0  40636     1 /usr/lib/systemd/systemd --switched-root
> --system --deserialize 26
>
> Have anyone faced similar issue ?
>
> Regards,
> Ajith