mysql performance tuning parameters

you've eliminated all queries for more than 1 seconds, the adjustment is very successful, which can help you eliminate the problem SQL before the problem becomes larger. 3, Log_queries_not_using_indexes It's a good idea to turn on this option, which actually records the query that returns all rows. Summary We introduced the MySQL parameters of the five types of settings, usually we rarely touch them, i

# The maximum size allowed for each temporary table in memory. If the temporary table size exceeds this value, the temporary table is automatically converted to a disk Based table.Thread_cache_size=8 # The maximum number of threads cached. When the client connection is broken, the thread that handles the client task is put back into the cache if the total number of client connections is less than that value. In high concurrency situations, if the value is set too small, many threads are created

After the MySQL service is started, run the showvariables and showstatus commands to view the static parameters and dynamic running status of the Mysql service. Showvariables is used to view MySQL parameters that are not changed after the database is started. After the

Ten parameters for optimizing mysql Performance: a detailed introduction to the ten parameters for optimizing mysql Performance 1) back_log:The number of connections that mysql can hav

option can be set in microseconds. This is a great feature, because once you have eliminated all queries whose query time exceeds 1 second, the adjustment is very successful, which helps you eliminate the problem SQL before the problem increases. 3. log_queries_not_using_indexes Enabling this option is a good idea. It actually records the query that returns all rows. Summary We have introduced five categories of MySQL

Ten parameters for optimizing MySQL database performance (1) and max_connections: Number of Customers allowed simultaneously. Increase the number of file descriptors required by mysqld. This number should be added. Otherwise, you will often see the too connector connections error. The default value is 100. I will change it to 1024. (2) record_buffer: Each thread

Ten parameters for optimizing MySQL database performance: bitsCN.com (1), max_connections: Number of Customers allowed simultaneously. Increase the number of file descriptors required by mysqld. This number should be added. Otherwise, you will often see the too connector connections error. The default value is 100. I will change it to 1024. (2) record_buffer: Eac

This article mainly introduces my. ten parameters (recommended) for optimizing mysql database performance by using ini. For more information, see mysql 5.5.45, otherwise, mysql is really unpleasant. (1), max_connections:Number of Customers allowed simultaneously. Increase t

This article describes how to use Max_connect_errors for detailed explanation of MySQL performance parameters. if you need it, you can refer to max_connect_errors as a security-related counter value in MySQL, it is responsible for blocking clients that fail too many attempts to prevent brute force password cracking. Th

We recommend that you use Opened_tables to configure the Open_Table parameters for MySQL Performance Optimization. Opened_tables indicates the number of opened tables. The following describes the rational configuration of MySQL Open_Table. MySQL Opened_tables indicates th

Outline: I. Overview 2. What is performance tuning? (What) 3. Why performance optimization? (Why) 4. When do I need performance optimization? (When) 5. Where do I need performance tuning? (Where) 6. Who will perform

this value when doing a recovery. # summary # set to 1 is of course the safest, but the performance page is the worst (as opposed to the other two parameters, but not unacceptable). If the data consistency and integrity requirements are not high, can be set to 2, if only for performance, such as high concurrent write log server, set to zero for higher

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 value of this parameter is related to Max_connections. Caching mechanism When a connection accesses a table, MySQL che

This article mainly introduces the actual application parameters in MySQL performance optimization. If you are crazy about the actual application parameters in MySQL performance optimization, do not miss the following articles. I

against the predefined hash algorithm and then go directly to the query cache to find out if it is already cached. That is, if it is already in the cache, the select request returns the data directly, omitting all subsequent steps (such as parsing of SQL statements, optimizer optimizations, and requesting data to the storage engine), which greatly improves performance. Of course, Query Cache also has a fatal flaw, that is, when any change in the dat

like MySQL, which have high requirements on CPU, memory, and disk.Therefore, to optimize the performance of hardware, We must select the appropriate hardware configuration. This is the first problem to be solved for website architecture or project implementation!#2. Operating System ##This book is called "Linux Performance T