In view of the low use cost 、 Cross platform 、 Cabinet and delicate 、 It's easy to use ,MySQL Database has become one of the most popular relational databases nowadays .

But often use MySQL Database friends should have some experience , Namely MySQL database In the face of high concurrency and big data , Performance will plummet . At this time MySQL The database will become like 《 Zootopia 》 Like lightning in , So that every query you need N It will take a long time to return ！

So in the face that the database may become slow , How can you make your database as “ Silky ” Get up ？ for example , You may often encounter MySQL Database Performance bottleneck , So how to tune at this time MySQL The performance of the database ？

here , I guess you will probably choose to go to Baidu 、Google, But the more embarrassing thing is , You will find that in most cases, the query methods are of little help to you . It may tell you , In this case, you should execute xxx This article SQL, But do you really dare to do it at this time ？ What if the database crashes after execution ？

Speaking of this , I especially want to share with you a practical case I encountered in my work before .

There is a , There is a strange phenomenon in our database ：write slowly ,TPS Very low , But the database host disk IO The pressure is not great . This makes us wonder ： Why is it disk IO When it's not high , Database write The speed is still very slow ？

We Baidu and Google After a long time, I still can't understand , A lot of turns , Finally we suddenly remembered MySQL The database is not adjusted directly according to the performance of the hard disk write Speed , But by innodb_io_capacity Parameters to tell MySQL Performance of Database disk . later , We changed it innodb_io_capacity After the parameters ,MySQL The performance of the database has been directly improved by an order of magnitude .

Yes , That's it , Rely on the right MySQL database Understanding and application of underlying operation principle , Not a temporary search .

So said , To tune MySQL Database performance 、 Solve performance problems , It's better to Have a deep understanding of MySQL The underlying principle of , And then according to MySQL To fundamentally solve common pain point problems , reform from the bottom , To cure the disease .

This is also 《MySQL Performance tuning must know and know 》 The origin of this booklet .

Booklet introduction and highlights

The overall sharing idea of this booklet is as follows ： Bottom up , The whole , go into the whys and wherefores of it , From the problem to the problem .

Specifically speaking, it is ： Start at the bottom , Little by little MySQL The underlying principle of peeling , Take you to analyze what kind of situations and problems you will encounter , Then I'll tell you how to base it on MySQL To fundamentally solve the problems encountered in these jobs or interviews “ Difficult miscellaneous diseases ”.

The whole booklet can be sorted as follows 4 On every level .

• Data architecture level ： Mainly about MySQL Possible problems between master and slave architectures , And how the master-slave architecture can improve the stability .

• SQL level ： Include SQL Life cycle of 、 Rights management 、count(*) The underlying principle of 、 The underlying sorting principle 、 The principle of connecting tables and so on , It's about from SQL How can we ensure that MySQL Database security 、 How to improve the query performance of the database .

• Storage engine level ： It includes InnoDB The underlying architecture of the storage engine 、 Indexing algorithm 、 How things work 、 Locking mechanism 、 Isolation mechanism 、 Unreal reading , Describes how we can use indexes at the storage engine level 、 What is the underlying principle of transactions 、 What problem does the locking mechanism solve 、 The specific role of the isolation mechanism .

• Data security ： It includes MySQL Rapid data migration 、 How to ensure the consistency of master-slave data in the database 、 Where on earth is the database, and the content of delay and so on , Tells the story of MySQL How to ensure data security in database 、MySQL What is the problem of data delay 、 How to ensure data consistency .

Its mind map is as follows ：

Through here 4 Three levels of learning , You will be right MySQL There's a whole new understanding . After this , Meet again MySQL Problems related to optimization , You can from MySQL Find the corresponding method in principle .

And to help you better understand MySQL There are many boring concepts and underlying logic in the database , I will make one boring and tedious MySQL The underlying principles of database are transformed into one after another Interesting and readable stories , So we can... Together Interesting learning promote MySQL Technical points of performance .

Who is the author

Xiaoyang love technology , Senior Development Engineer . A database administrator && Container cloud fanatics , Working for a large group company in China , Mainly responsible for database maintenance and cloud native Internet architecture .

Master MySQL High availability cluster architecture and Kubernetes Container Cloud Architecture . To dabble in MySQL High availability 、 Container cloud 、 Hybrid cloud and other technologies ; From the 0 To 1 structure MySQL High availability cluster architecture and enterprise container cluster architecture have rare practical production experience .

Suitable for who to learn

1. Hope to enter the big factory , But there is an urgent need for a bottom pressing technology to conquer the interviewer's friends .
2. In the process of database management , Encounter database bottleneck, do not know how to optimize friends .
3. hope “ From point to line 、 From the line to the surface ” Build your own MySQL Friends of database knowledge system .

in other words , Whether you are a job seeker who wants to enter a big factory , Or a development engineer 、 O & M Engineer 、 Architects , Or the team leader , You can join us , Start improving together MySQL Learning journey of data performance ！

Through this little book 4 On every level Explain the content of , can Let you understand MySQL The underlying principle of database , In this way, in the face of all kinds of work 、 Or in the interview MySQL Database problems , Can be followed , Yes “ Law ” Keyi , Help you maintain MySQL Database time , Check and make up for deficiencies , Conquer all kinds of “ Difficult miscellaneous diseases ”.

A new special , Time limit 6 compromise

The original price ¥29.9, A new special , Time limit 6 fold , Count down ¥17.94, Now it's super cost-effective to buy . hurriedly Click on the picture below perhaps Scan the poster QR code , Join us in learning ！

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