Shulou(Shulou.com)05/31 Report--

This article focuses on "how to accelerate the MySQL database", interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to accelerate the MySQL database.

What if you were a race car driver and could change the engine immediately at the click of a button without having to drive the car into the garage to change it? what MySQL Database does for developers is like pressing a button to change the engine; it allows you to choose the database engine and gives you an easy way to switch it.

MySQL's own engine is certainly enough, but in some cases, other engines may be more suitable for the task than the one at hand. If you like, you can even use MySQL++ API to create your own database engine, just like piercing a cylinder to install your own carburetor. Now let's take a look at how you choose the engine and how to switch between the available engines.

Choose your engine.

The database engine you can use depends on how MySQL is compiled during installation. To add a new engine, you must recompile MySQL. The concept of compiling an application just to add a feature may seem strange to Windows developers, but in the Unix world, it has become the standard. By default, MySQL supports three engines: ISAM, MyISAM, and HEAP. The other two types, InnoDB and Berkley (BDB), are also often available.

ISAM

ISAM is a well-defined and time-tested data table management method. When it is designed, it takes into account that the number of times the database is queried is much greater than the number of updates. As a result, ISAM performs read operations very quickly and does not consume a lot of memory and storage resources. The two main drawbacks of ISAM are that it does not support transactions and is not fault tolerant: if your hard drive crashes, the data files cannot be recovered. If you are using ISAM in mission-critical applications, you must back up all your real-time data frequently, and MySQL can support such backup applications through its replication feature.

MyISAM

MyISAM is MySQL's ISAM extension format and default database engine. In addition to providing a large number of functions of index and field management that are not available in ISAM, MyISAM also uses a table locking mechanism to optimize multiple concurrent read and write operations. The cost is that you need to run the OPTIMIZE TABLE command frequently to recover the space wasted by the update mechanism. MyISAM also has some useful extensions, such as the MyISAMChk tool to repair database files and the MyISAMPack tool to recover wasted space.

MyISAM emphasizes fast read operations, which is probably the main reason why MySQL is so popular with Web developers: a lot of the data operations you do in Web development are read operations. Therefore, most providers and Internet platform providers (Internet Presence Provider,IPP) are only allowed to use the MyISAM format.

HEAP

HEAP allows temporary tables that reside only in memory. Staying in memory makes HEAP faster than both ISAM and MyISAM, but the data it manages is unstable, and if it is not saved before shutting down, all data will be lost. HEAP does not waste a lot of space when the data row is deleted. HEAP tables are useful when you need to use SELECT expressions to select and manipulate data. Remember to delete the table after you have finished using it. Let me repeat: don't forget to delete the form after you have finished using it.

InnoDB and Berkley DB

Both InnoDB and the Berkley DB (BDB) engine are direct products of the technology that makes MySQL flexible, which is MySQL++ API. Almost every challenge you face when using MySQL stems from the fact that the ISAM and MyISAM database engines do not support transactions or foreign keys. Although much slower than the ISAM and MyISAM engines, InnoDB and BDB include support for transactions and foreign keys that the first two engines do not have. As mentioned earlier, if your design requires one or both of these features, you will be forced to use one of the last two engines.

If you feel really skilled, you can also use MySQL++ to create your own database engine. This API provides you with the ability to manipulate fields, records, tables, databases, connections, secure accounts, and all the other myriad other features you need to set up a DBMS such as MySQL. An in-depth explanation of API is beyond the scope of this article, but it is important that you understand the existence of MySQL++ and the technology behind its interchangeable engines. It is estimated that the model of this plug-in database engine can even be used to create a native XML provider (XML provider) for MySQL. (any MySQL++ developer reading this article can take this as a requirement.)

At this point, I believe you have a deeper understanding of "how to accelerate the MySQL database". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.