Disabling CPU management

This is going to be a function of your hardware setup.
Please provide the server make/model and Linux distribution/version and kernel.

The process to maximize server performance varies greatly depending on what you have available to you...

For instance:

• Red Hat 6 systems have the tuned-adm framework which disables the CPU governors. (Also see this graphic.)
• HP ProLiant servers (and others) have a specific tuning guide and steps for low-latency and performance-optimized setups.
• Most hardware vendors have specific BIOS settings that can help (disabling C-States and P-States - also frequency-scaling).

So please, provide more context about what you're looking for.

Check the matrix listed in this answer for some general information on the RHEL approach.

Edit: From your kernel string, this appears to be a Red Hat-like RPM-based system.

I would suggest downloading the tuned-adm utilities and changing your system's performance profile to accomplish what you want.

In your case:

yum install tuned tuned-utils
tuned-adm profile latency-performance

or maybe:

tuned-adm profile enterprise storage

Either will disable the CPU governor.

The system settings and profiles are arranged according to the schedule below: