Why are the CloudLinux LVE memory limits not being enforced for Apache?

Question

Why are the CloudLinux LVE memory limits not being enforced for Apache?

Answer

CloudLinux is not fully compatible with Apache module mod_ruid2. You can confirm whether it is being used or not with this command:

apachectl -M | grep ruid

If there is no output, mod_ruid2 is not in use. If it shows output like the following example, you will need to replace it with mod_suexec.

[server root@hostname ~]cPs# apachectl -M | grep ruid
ruid2_module (shared)

CloudLinux documentation on this is available here.

We have more information on the modules in this article: mod_ruid2 vs mod_suexec

To ensure that the LVE memory limits are being enforced for Apache, you will need to utilize EasyApache 4 to remove mod_ruid2 and replace it with mod_suexec. Information on installing Apache modules in WHM is available here:

How to install an Apache module in WHM