How to install and use cpulimit under Linux to limit the utilization of CPU

This article introduces the knowledge of "how to install and use cpulimit to limit the utilization of CPU under Linux". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

As there are more and more programs on the Linux system, cpu can sometimes fall short, and some processes can limit cpu. Cpuliimt perfectly solves this problem. Cpulimit is very easy to install and use, so read on.

1. Cpulimit installation

1.1 Ubuntu/Debian:

The code is as follows:

# apt-get install cpulimit

1.2 RedHat/CentOS

The code is as follows:

# yum install cpulimit

Please install the Epel source first and execute the yum command.

2. Cpulimit instance

2.1 according to the process ID limit

The code is as follows:

# cpulimit-p 1234-l 40

A program with a process ID of 1234 can only use 40% cpu

2.2 according to the process path limit

The code is as follows:

# cpulimit-e / usr/local/nginx-1.4.1/sbin/nginx-l 50

Nginx can only use 50% of cpu

3. Matters needing attention

It's important to note here that the default value after-l is percentage, and it should be halved in the case of dual cores. For example, in the case of nginx, in the case of dual-core cpu, he can use 25% of cpu. In the case of 4 cores, only 12.5% of cpu.root users can limit all processes, and ordinary users can only limit their own programs.

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