How is the default value of the user.max_*_namespaces sysctl parameters determined?

Solution Verified - Updated 2025-07-09T08:46:33+00:00 -

Issue

In RHEL 7.4 and later, sysctl parameters such as user.max_cgroup_namespaces and user.max_ipc_namespaces are available.
- RHEL7.4 Release Notes - Chapter 3. Important Changes to External Kernel Parameters
The default values for these parameters can fluctuate between systems or after a reboot or kernel update. How are these values calculated, and why do they change?

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