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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".

Remotely Restarting The Management Agents On ESXi 5.x

The ESXi management agents can be restarted from the host's console - which is not very convenient. Fortunately they can also be restarted remotely using the SSH & ESXi Shell services - but these are not enabled by default.

In Virtual Center select the host, then the Configuration tab. In the security section select Services and Properties in order to enable ESXi Shell and SSH. For both services perform a manuals start.

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