![]() ![]() ![]() For more information on privileges see our Users and Groups guide. Be sure to run the steps below as root or with the sudo prefix. Check MySQL documents for more details on InnoDB compression at .The steps in this guide require root privileges. To enable compression, you need an InnoDB storage engine with innodb_file_per_table enabled and the file format set to Barracuda. Data and indexes are stored in a compressed format, resulting in reduced I/O and a smaller database size, though it needs more CPU cycles to compress and uncompress data. Compression is useful for tables with long textual contents and read-intensive workloads. The wizard is available at ĭepending on the type of data, you can opt for compressed tables. Percona systems provide a developer-friendly, web-based configuration wizard to create a configuration file for your MySQL server. You can download and use this script as follows: It gives recommendations for various settings such as slow query log, max connections, query cache, key buffers, and many others. MySQL performance tuning primer script: This script takes information from show status and show variables statements. Make sure that you set proper rotation values to avoid large dump files. Log_bin enables binary logging, which can be used for replication and also for crash recovery. You can also set this as a command-line parameter. ![]() mysqld set it to 16M and mysqldump set it to 24M. Increase this value if your server runs queries with large result sets. Max_allowed_packet sets the size of the packet size that MySQL can send at a time. Use connection pooling in the application if possible. Higher values may result in higher memory consumption and an unresponsive server. Set this value as per your application's requirements. Max_connections sets the number of maximum concurrent connections allowed. It is identified as a bottleneck for concurrent queries and MySQL 5.6 disables it by default. Query_cache_size caches the result of a query. Slow query logging can be useful for identifying repeated slow queries. Slow_query_log and long_query_time enable slow query logging and set slow query time respectively. Key_buffer_size: determines the key buffer for MyISAM tables. Innodb_file_per_table: This determines whether to use shared table space or separate files for each table. These logs are helpful in faster writes and crash recovery. Log_file_size: the size of the redo logs. It is assumed that MySQL is the only service running on server. You can set this to around 70% of available physical memory as MySQL uses extra memory beyond this buffer. The larger the buffer pool, the more data can be cached in it. Innodb_buffer_pool_size: the size of the cache where InnoDB data and indexes are cached. The following are details on the preceding settings: ![]() Once you are sure that settings work as expected, you can move them to the configuration file. You can test settings in runtime and easily reverse them if they do not work as expected. Secondly, most settings can be changed at runtime with a SET statement. There is no silver bullet that works for all, and similarly, some of these settings may or may not work for you. Ensure that you change one setting at a time and assess its results. The preceding example shows some important settings for MySQL performance tuning. Increase max_allowed_packet to increase the maximum packet size:Įnable binary logging for easy recovery and replication:Īdditionally, you can use, which gives general recommendations about the MySQL best practices: Set the maximum connections as per your requirements: Slow_query_log_file = /var/lib/mysql/mysql-slow.log If you are using MyISAM tables, set the key buffer size: Innodb_buffer_pool_size = 512M # around 70% of total ram $ sudo nano /etc/mysql//mysqld.cnfĪdjust the following settings for your InnoDB tables: You will need access to a root account on the MySQL server.įollow these steps to improve MySQL configuration:įirst, create a backup of the original configuration file: You will need access to a root account or an account with sudo privileges. In this recipe, we will look at some of the most important parameters for tuning MySQL performance. Version 5.7 ships with many improvements in default configuration values and requires far fewer changes. MySQL has hundreds of settings that can be configured. ![]()
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