LVE enabled users have RAM usage on 100% and invalid values in meminfo

Issue

• Some LVE enabled users have RAM usage at 100%, and they have low number or no processes at all

• Some LVE enabled users have invalid values in /proc/bc/lveXXXX/meminfo where the total mem, cache, active... shows the total amount of the same values from the server itself. So the user has no free memory based on LVE parameters.

• cagefsctl remount temporarily resolves it, but after several hours the issue comes back.

• Disk cache usage is not an issue

Environment

• CloudLinux 7
• Kernel version: 3.10.0-962.3.2.lve1.5.68.el7 or 3.10.0-962.3.2.lve1.5.67.el7.x86_64

Solution

Update kernel version to 3.10.0-962.3.2.lve1.5.70.el7 or newer by using the following command:

# yum update kernel --enablerepo=cloudlinux-rollout-2-bypass

Note: At the moment the kernel package is in rollout slot, thus it may be instable and you can always disable rollout on your server using this article.