showq high CPU usage

root@proxmox:/proc/17873# tail -n+1 cmdline comm cgroup
==> cmdline <==
showq-tunix-u
==> comm <==
showq

==> cgroup <==
0::/lxc/102/ns/system.slice/system-postfix.slice/postfix@-.service
root@proxmox:/proc/17873#
root@proxmox:/proc/17873#
root@proxmox:/proc/17873# ls -l cwd exe
lrwxrwxrwx 1 root root 0 Apr 20 15:34 cwd -> /var/spool/postfix
lrwxrwxrwx 1 root root 0 Apr 20 15:33 exe -> /usr/lib/postfix/sbin/showq
root@proxmox:/proc/17873# cat environ | tr '\0' '\n'
MAIL_CONFIG=/etc/postfix
MAIL_LOGTAG=postfix
LANG=C
GENERATION=153
root@proxmox:/proc/17873#


OMG its coming from the lxc 102 ? It's a mail server !