mysql performance

Table_cache is a very important MySQL performance parameter, which is called Table_open_cache in the 5.1.3 version. Table_cache is primarily used to set the number of table caches. Because each client connection accesses at least one table, the

Original: http://bbs.landingbj.com/t-0-245601-1.html1. To select the most applicable field propertiesMySQL is good at supporting large data volumes, but in general, the smaller the tables in the database, the faster queries are executed on it.

Left ear Mouse: https://coolshell.cn/articles/1846.htmlToday, database operations are increasingly becoming a performance bottleneck for the entire application, which is especially noticeable for web applications. It's not just about the performance

Optimization technology of 1.1 MySQL database1, MySQL optimization is a comprehensive technology, mainly including1. Rationalization of table design (3NF compliant)2. Add appropriate index (index) [Four kinds: normal index, primary key index, unique

The purpose of MySQL performance optimizationHow to design the database rationally?What database design can provide the cornerstone for post-DBA optimization?The difference between database design and program design?Early optimization of database

1. Download JDBC. Unzip the JDBC and copy the Mysql-connector-java-version-ga-bin.jar file to Jmeter/lib 2. Open the JMeter and set the JDBC request. 1) dtbase url:jdbc:mysql://localhost:3306/datebasename. of which localhost : 3306, this is the

first, SQL statement optimization1-1.mysql Slow Log1). Slow log on mode and storage formatHow do I find the problematic SQL? Use MySQL slow logs to monitor efficiency issues with SQLPre-preparationMysql> Show variables like '%log_queri% '; +---------

1: View the storage engine information for MySQL1.1 Use the show Engines command.Mysql> show engines;+--------------------+---------+----------------------------------------------------------------+-------------- +------+------------+| Engine |

Increase the size of a temporary table by setting the Tmp_table_size option, such as a temporary table generated by the advanced group by operation. If this value is raised, MySQL will also increase the size of the heap table to improve the speed of

Now most of the environment that MySQL runs is on Linux, how to optimize on the Linux operating system according to MySQL, we give some general simple strategy here. These methods help improve the performance of MySQL.Now most of the environment

One, MySQL query optimizer1. mysql has an optimizer module dedicated to optimizing the SELECT statement, the main function: through the calculation of statistical information collected in the analysis system, the client's Query to provide him with

Because most of us use InnoDB, so this blog is mainly based on InnoDBB + Tree (image from Network)B + Tree graph from Network1. The difference between a clustered index and a nonclustered indexClustered index: Leaf node contains complete data

1. Optimize your query for query cachingMost MySQL servers have query caching turned on. This is one of the most effective ways to improve sex, and this is handled by the MySQL database engine. When many of the same queries are executed multiple

Software Download:wget http://imysql.com/wp-content/uploads/2014/09/tpcc-mysql-src.tgzInstallation dependencies:Yum Install-y mysql-develUnzip the installation:Tar XF Tpcc-mysql-src.tarMakePrepare before testing:[Root Tpcc-mysql] $mysql-uroot-p123456

----------------------------------------------------MySQL------------------------------------------------------------1. Download JDBC, unzip the JDBC, copy the Mysql-connector-java-version-ga-bin.jar file to Jmeter/lib;2. Open the JMeter and set the

1. Index the WHERE condition after the query operation select and the Sort field2. On-demand query, which field you need to check which field, prohibit the use of "select *"3. The database engine is best chosen InnoDB, less with myisam,myisam

Today, database operations are increasingly becoming a performance bottleneck for the entire application, which is especially noticeable for web applications. It's not just about the performance of the database that DBAs need to worry about, it's

Max_connect_errors is a security-related counter value in MySQL that is responsible for blocking excessive attempts by clients that fail to prevent brute-force password violations. The value of max_connect_errors is not much related to performance.

12th principles of extensible designPreface:With the rapid increase of information, the development of hardware equipment has been slowly unable to keep up with the application system to the processing capacity requirements. At this point, how can

I. BACKGROUNDRecently in the reconfiguration of resource scheduling management platform, Resource/property database design, in the absence of more optimized scheme, intends to follow the database structure of the current platform, which needs to