{"id":3626,"date":"2018-10-12T10:49:12","date_gmt":"2018-10-12T05:19:12","guid":{"rendered":"https:\/\/www.skynats.com\/?p=3626"},"modified":"2024-12-05T16:18:06","modified_gmt":"2024-12-05T10:48:06","slug":"how-to-optimize-mysql-server-performance","status":"publish","type":"post","link":"https:\/\/www.skynats.com\/blog\/how-to-optimize-mysql-server-performance\/","title":{"rendered":"How to Optimize MySQL server"},"content":{"rendered":"\n<p>MySQL is a powerful open-source database that supports a wide range of database-driven applications. As users push MySQL beyond its limits, learning how to optimize MySQL server performance becomes crucial. Running MySQL with optimal settings based on your server&#8217;s resources is key to managing heavy server loads and preventing slowdowns. To ensure peak performance, equipping your server with ample memory and fast, large drives is essential. When we conduct a MySQL performance review, we assess the setup and suggest improvements. MySQL offers many configurable variables that meet specific needs for better performance.<\/p>\n\n\n\n<p><strong>BASIC SETTINGS<\/strong><\/p>\n\n\n\n<p>Here are some key MySQL performance tuning settings to consider when learning how to optimize MySQL server performance.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>innodb_buffer_pool_size<\/strong><\/li>\n<\/ul>\n\n\n\n<p>The larger the buffer pool, the more&nbsp;InnoDB acts like an in-memory database, reading data from disk&nbsp;as&nbsp;soon as after which having access to the records from memory at some point of subsequent reads.&nbsp;Typical&nbsp;values are 5-6GB(8GB Ram),20-25GB(32GB Ram), 100-120GB(128GB Ram).<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>innodb_log_file_size<\/strong><\/li>\n<\/ul>\n\n\n\n<p>This is the size of the redo logs. The redo logs used to ensure writes are fast and desirable and also during crash recovery. Fortunately, crash recovery performance has stepped forward a lot since Mysql5.5. So you can now have good write overall performance and rapid crash recovery. In MySQL 5.5, the entire redo log size was restricted to 4GB, but this limitation was removed in MySQL 5.6.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>max_connections<\/strong><\/li>\n<\/ul>\n\n\n\n<p>If you get a \u201ctoo many connections\u201d error in&nbsp;MySQL that means&nbsp;the max connection is too low or the number of available connections is&nbsp;in use by other clients on the server. So&nbsp;in this case, you need much more than the default 151 connections. The main drawback of high values for&nbsp;max_connection is that server turns unresponsive if for any motive it has to run 1000 or more active transactions.<\/p>\n\n\n\n<p>when tuning server variables for maximum performance, the&nbsp;MySQL manual recommends that you first look at the&nbsp;key_buffer_size and&nbsp;table_cache variables.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>key_buffer_size<\/strong><\/li>\n<\/ul>\n\n\n\n<p>This variable determines the size of the index buffers held in memory, which affects the speed of index reads.&nbsp;Typically, you would want to keep this value near 25 to 30% of the total available memory on the server.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>table_open_cache<\/strong><\/li>\n<\/ul>\n\n\n\n<p>This value indicates the maximum number of tables the server can keep open in a single table cache instance. If you set the <code>table_open_cache<\/code> value too high, MariaDB may refuse connections as the operating system runs out of file descriptors.<\/p>\n\n\n\n<h4 class=\"wp-block-heading has-normal-font-size\" id=\"h-innodb-settings\"><strong>InnoDB SETTINGS<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>innodb_file_per_table<\/strong><\/li>\n<\/ul>\n\n\n\n<p>InnoDB stores all tables and indexes in the system tablespace by default. However, <strong>innodb_file_per_table<\/strong> provides an alternative where InnoDB stores each table and its indexes in a separate .ibd data file, creating individual tablespaces. The <strong>innodb_file_per_table<\/strong> option controls this behavior, and it is enabled by default. When enabled (<strong>innodb_file_per_table = on<\/strong>), InnoDB stores data and indexes in separate .ibd files for each table. If disabled (<strong>innodb_file_per_table = off<\/strong>), it stores them in the shared tablespace. One key advantage of this approach is that it can increase the likelihood of a successful recovery and reduce downtime when corruption occurs.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>innodb_flush_log_at_trx_commit<\/strong><\/li>\n<\/ul>\n\n\n\n<p>If&nbsp;innodb_flush_log_at_trx_commit=0 then&nbsp;InnoDB writes the modified data to log file and flush the log file every second, but it will not do anything at transaction commit. In case the system crashes, all the unflushed data will not be recoverable, since it is not written to log files or stored disks. If&nbsp;innodb_flush_log_at_trx_commit=1 then&nbsp;InnoDB writes the log buffer to the transaction log&nbsp;and flush to durable storage for every transaction.&nbsp;If&nbsp;innodb_flush_log_at_trx_commit=2 then&nbsp;InnoDB writes the log buffer to a log file at every commit but doesn\u2019t write data to disk.&nbsp;InnoDB flush data once every second. Even if the system crashes, data in the log file will be available and can be recoverable.<\/p>\n\n\n\n<h4 class=\"wp-block-heading has-normal-font-size\" id=\"h-other-settings\"><strong>OTHER SETTINGS<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>log_bin<\/strong><\/li>\n<\/ul>\n\n\n\n<p>To set the server as a replication master, enable binary logging and set the <strong>server_id<\/strong> to a unique value. Enabling binary logging causes the server to log all data-changing statements to the binary log, which you can then use for backup and replication.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>query_cache_size<\/strong><\/li>\n<\/ul>\n\n\n\n<p>To set the query cache size, use the <code>query_cache_size<\/code> system variable. Setting <code>query_cache_size=0<\/code> disables the query cache, and zero is the default value, meaning the cache is disabled by default. To improve <a href=\"https:\/\/www.mysql.com\/\">MySQL<\/a> server performance, enable the query cache and specify its size. The query cache requires a minimum size of 40KB to allocate its structure.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>query_cache_type<\/strong><\/li>\n<\/ul>\n\n\n\n<p>When the system variable <code>query_cache_type<\/code> is set to 1, the system stores all queries that meet the size constraints in the cache, unless they include an <code>SQL_NO_CACHE<\/code> clause. To ensure that no queries are stored in the cache unless explicitly required, set the <code>query_cache_type<\/code> server variable to 2 or demand. This will cache only queries with the <code>SQL_CACHE<\/code> attribute. To define the size of the query cache, adjust the <code>query_cache_size<\/code> system variable. Setting it to 0 disables the query cache, as does setting <code>query_cache_type<\/code> to 0. By default, the query cache is disabled.<\/p>\n\n\n\n<p>For expert assistance on how to optimize MySQL server performance, contact <a href=\"http:\/\/www.skynats.com\/\">Skynats<\/a>. Our team of professionals is ready to review your MySQL setup, suggest performance improvements, and ensure your server runs at peak efficiency. Reach out today for tailored solutions and support!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MySQL is a powerful open-source database that supports a wide range of database-driven applications. As users push MySQL beyond its limits, learning how to optimize MySQL server performance becomes crucial. Running MySQL with optimal settings based on your server&#8217;s resources is key to managing heavy server loads and preventing slowdowns. To ensure peak performance, equipping [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[45,46,47,48],"class_list":["post-3626","post","type-post","status-publish","format-standard","hentry","category-blog","tag-mysql-performance","tag-mysql-server","tag-mysql-tuning","tag-mysql-tuning-tips"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.9 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How to Optimize MySQL server performance<\/title>\n<meta name=\"description\" content=\"Learn how to optimize MySQL server performance with expert tips. Follow our guide to enhance performance now!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.skynats.com\/blog\/how-to-optimize-mysql-server-performance\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Optimize MySQL server\" \/>\n<meta property=\"og:description\" content=\"Learn how to optimize MySQL server performance with expert tips. 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