What are the reasons for the frequent high CPU of ECS?

Recently, a new bird cloud has been launched 1 nucleus 1G Cloud server , It is mainly used to do simple tests , After using it for a period of time, I feel CPU Often run high , So I sorted out the relevant contents , Summarize ECS CPU The reason why I often run high .

What is cloud server CPU
a central processor CPU（Central Processing Unit） It is the computing core and control core of the server , It is mainly used to interpret instructions and process data .
CPU Its working principle is divided into the following four stages .
1. extract ：CPU Fetch instructions from memory or cache , Place in instruction register .
2. decode ：CPU Decoding instructions .
3. perform ：CPU Execution instruction .
4. Write back to ：CPU Write the execution results into the cache , For quick access to subsequent instructions .
CPU The order of accessing data is ： cache 、 Memory 、 Hard disk .CPU Will first find the required data from the cache , If found, return the value ; otherwise , Go to memory 、 Look for data in the hard disk .
Cloud server CPU It can also be understood as the cache configuration of ECS , Servers of different devices CPU The configuration is also different , When choosing, you should choose the right one according to your actual situation and needs CPU Set up .
Cloud server CPU The reason for running high
1. ECS configuration is too low , Unable to host the website
If the configuration of ECS is too low , But there are more website data , It's easy to appear CPU Running high , At this time, you can upgrade the configuration of ECS .
2. Under attack
If the website is DDoS Attack or CC attack , Cloud server CPU There will also be running high , A large number of , Abnormal access , Let the ECS run at a high load , The website will be inaccessible . If it's this , Need to contact the service provider in time , Work orders or call them to help solve problems .
3. There is a problem with the master hardware
If you find a service provider casually on Taobao , Or online is very cheap but not qualified , Many contents of ECS usage and after-sales cannot be guaranteed , Because informal service providers lack Technology , It's easy to make mistakes when building , Affect our use .
After troubleshooting from the above three aspects , I found that my little bird ECs was attacked , So I contacted Technology , Help solve the problem soon , bernays ！