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systemd

Disabling Transparent Huge Pages in CentOS7

The THP (Transparent Huge Pages) feature of modern LINUX kernels is a boon for on-metal servers with a sufficiently advanced MMU. However they can also result in performance degradation and inefficiently memory use when enabled in a virtual machine [depending on the hypervisor and hosting provider]. See, for example "Use of large pages can cause memory to be fully allocated".

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