Why does the program cpu utilization exceed 100%
cpu utilization
First, what is cpu utilization? I have summarized it before Knowledge points related to cpu utilization . Generally, you can check the cpu utilization of the process through the top command. Sometimes you will find that the cpu utilization of a process exceeds 100%. For example:
top - 10:12:55 up 3 days, 13:09, 1 user, load ...
Posted by pedroz on Thu, 12 May 2022 05:38:01 +0300
Chapter III installation and management procedures of Linux
Chapter III installation and management procedures of inux
preface
After the Linux operating system is installed in the host, it has the foundation to provide software services, network services and other functions. However, there are only a few software packages installed with the operating system after all, and the functions realized ...
Posted by Seas.Comander on Thu, 12 May 2022 01:09:16 +0300
Master slave replication of a database that has been running for a period of time
Master slave replication of a database that has been running for a period of time
Preface: a few days ago, the master-slave replication of MySQL database that has been running for a period of time and has not opened bin log was made. Hereby, the detailed operation steps and instructions are recorded. Note that this synchronization does not use ...
Posted by virtuexru on Wed, 11 May 2022 23:14:11 +0300
Introduction and principle analysis of Nginx
Introduction and principle analysis of Nginx
Introduction to Nginx
Nginx is an asynchronous web server that can be used as a reverse proxy, load balancing, and caching server
Basic functions:
Web server (common)
Reverse proxy server (common)
Mail proxy server (rarely used)
General TCP / UDP proxy server (four layer scheduler)
characteris ...
Posted by dough boy on Wed, 11 May 2022 22:59:56 +0300
Build k8s notes in kubedm mode
Environmental preparation
Four sets Centos7 Virtual machine:
10.15.5.230 ks-master
10.15.5.231 k8s-node1
10.15.5.232 k8s-node2
10.15.5.233 k8s-node3
Basic settings
Modify the host name and hosts file (all hosts)
hostnamectl set-hostname myhostname(Modify the host name of the host separately)
# Modify hosts file
cat <<EOF > /etc/s ...
Posted by Tremor on Wed, 11 May 2022 16:48:07 +0300
Linux - basic file system management disk partition
File system management
Disk structure
Logical structure of disk
The size of each sector is fixed, 512Byte. A sector is also the smallest storage unit of a disk
The size of the hard disk is the number of Heads used × Cylinders × sector number × The size of each sector is calculated according to the formula & ...
Posted by mdl on Wed, 11 May 2022 08:22:59 +0300
The characteristics of zookeeper and the use of common commands
The characteristics of zookeeper and the use of common commands
zookeeper is a distributed, open source distributed application coordination service. It is a software that provides consistency services for distributed applications.
The application scenarios of zookeeper are as follows:
Data publishing subscription
load balancing
Naming ser ...
Posted by neoboffins on Wed, 11 May 2022 07:06:37 +0300
Understand the story behind gcc
1, gcc generation uses a static library and so dynamic library
1) Create a new folder test1
mkdir test1
Enter folder test1
cd test1
Use vim command to generate hello h，hello.c，main.c three documents
vim hello.h
#ifndef HELLO_H
#define HELLO_H
void hello(const char *name);
#endif//HELLO_H
vim hello.c
#include<stdi ...
Posted by duelist on Wed, 11 May 2022 05:27:18 +0300
Linux multithreaded programming
This chapter will be divided into two parts to explain. The first half will introduce the use scenarios and basic concepts of threads, and illustrate the basic process from thread creation to exit to recycling through example code. The latter part will explain through the example code that if the thread is well controlled, the concepts and usag ...
Posted by brash on Wed, 11 May 2022 02:57:23 +0300
Redis series, how redis executes commands
preface
The last article introduced the structure of sds and how to use sds. In this chapter, we will go back to the place of reading io data to see how redis reads data from io and finally converts it into the process of executing commands. This article needs to be familiar with the previous two articles first. Students who haven't read ...
Posted by dustbuster on Tue, 10 May 2022 08:16:03 +0300