CLOS-3583: Update physical memory limit documentation #281
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Add information about configuring a system-wide lower bound for pmem limit
docs/cloudlinuxos/limits/README.md
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| #### Physical memory lower bound | ||
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| CloudLinux OS allows administrators to configure a lower bound (minimum value) for physical memory (PMEM) limits to prevent setting limits that are too low and could cause application instability. When a lower bound is configured, any attempt to set a PMEM limit below this threshold will be rejected with an error message. This helps ensure that hosting accounts always have sufficient memory allocated for basic application requirements, preventing performance issues and unexpected application failures. The lower bound is enforced system-wide and applies to all limit-setting operations, whether performed through command-line tools or control panel integrations. |
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will be rejected with an error message
"... displayed by CLI tool or Cloudlinux Manager UI".
This way we explain what to expect from UX standpoint.
docs/cloudlinuxos/limits/README.md
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| #### Physical memory lower bound | ||
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| CloudLinux OS allows administrators to configure a lower bound (minimum value) for physical memory (PMEM) limits to prevent setting limits that are too low and could cause application instability. When a lower bound is configured, any attempt to set a PMEM limit below this threshold will be rejected with an error message. This helps ensure that hosting accounts always have sufficient memory allocated for basic application requirements, preventing performance issues and unexpected application failures. The lower bound is enforced system-wide and applies to all limit-setting operations, whether performed through command-line tools or control panel integrations. |
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system-wide
I would format this with bold font.
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| ``` | ||
| lvectl --set-pmem-lower-bound 512M |
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lvectl
This may be too late to ask, but why did we decide to make it configurable via 2 CLI tools instead of only one? :)
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cloudlinux-limits can be used from the CLI, however it is an interface for the UI mainly. It only works with --json flag (for other options as well) and might be useful if in the future we decide to have the ability to set this lower bound from the UI. Initially I implemented it only for lvectl and Roman requested to do the same for cloudlinux-limits
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| The lower bound value accepts standard memory format notations (e.g., <span class="notranslate">`512M`</span>, <span class="notranslate">`1G`</span>, <span class="notranslate">`2048M`</span>). | ||
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| The configured PMEM lower bound value is stored in the <span class="notranslate">`/etc/sysconfig/limits_lower_bounds`</span> configuration file. |
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Makes sense to indicate what is the default value out of the box i.e. not configured.
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Add information about configuring a system-wide lower bound for pmem limit