golang settings nice

What is nice in Golang?

In Linux systems, nice is a tool for scheduling processes. It is a process priority scheduling algorithm used to allocate system resources. Each process has a nice value, ranging from -20 to 19, where -20 represents the highest priority and 19 represents the lowest priority. By default, the nice value of a process is 0, which means normal priority.

In Golang, we can adjust the priority of the process by setting the nice value to achieve better performance and efficiency.

How to set the nice value of Golang?

Golang provides a function Setpriority in the os package to set the nice value. The specific usage is as follows:

import "syscall"
import "os"

func SetNice(pid int, priority int) error {
    return syscall.Setpriority(syscall.PRIO_PROCESS, pid, priority)
}

//设置当前进程的nice值为10
SetNice(os.Getpid(), 10)

As you can see, we used syscall.Setpriority(syscall.PRIO_PROCESS, pid, priority ) function to set the nice value. Among them, syscall.PRIO_PROCESS means that we are setting the nice value of a process, pid means the ID number of the process, and priority means the nice value to be set. The return value of the function is an error. If nil is returned, the setting is successful. Otherwise, the setting fails.

It should be noted that setting the nice value requires a trade-off between the long-term stability and performance of the process. If the nice value of a process is set too high, it will occupy a lot of system resources, causing other processes to respond slowly, thus affecting the overall performance of the system. On the contrary, if the nice value of a process is set too low, the priority of the process may be too low and the execution time may become longer, affecting the performance of the process.

Conclusion

In Golang programs, setting nice is one of the best optimization methods. By setting the nice value, the program can obtain better responsiveness and improve the running efficiency and performance of the program. However, for different applications, it needs to be adjusted according to the actual situation to obtain the best performance.

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