{"id":2144,"date":"2026-06-29T08:18:44","date_gmt":"2026-06-29T08:18:44","guid":{"rendered":"https:\/\/ukspeed.co.uk\/blog\/?p=2144"},"modified":"2026-10-26T11:36:49","modified_gmt":"2026-10-26T11:36:49","slug":"mariadb-vs-mysql-vs-postgresql-for-wordpress-in-2026-which-database-wins-on-uk-hosting","status":"publish","type":"post","link":"https:\/\/ukspeed.co.uk\/blog\/mariadb-vs-mysql-vs-postgresql-for-wordpress-in-2026-which-database-wins-on-uk-hosting\/","title":{"rendered":"MariaDB vs MySQL vs PostgreSQL for WordPress in 2026: Which Database Wins on UK Hosting?"},"content":{"rendered":"<!-- uks-auto-extlink: intentionally suppressed by author -->\n\n\n\n<p>The choice between <strong>MariaDB vs <a href=\"https:\/\/ukspeed.co.uk\/blog\/mysql-replication-uk-vps-master-replica-high-availability-2026\/\">MySQL<\/a> vs <a href=\"https:\/\/ukspeed.co.uk\/blog\/self-host-postgresql-uk-vps-production-setup-tuning-2026\/\">PostgreSQL<\/a><\/strong> is one of the most consequential \u2014 and most overlooked \u2014 decisions for WordPress sites on UK hosting in 2026. The exact same WordPress code on the same hardware can serve 2-3\u00d7 more concurrent users (and respond 30-60% faster) depending on which database engine is doing the work behind it. For British sites competing on Core Web Vitals and Google UK rankings, that performance gap is decisive.<\/p>\n\n\n\n<p>This guide compares MariaDB vs MySQL vs PostgreSQL head-to-head for WordPress: architecture, real benchmark numbers, configuration tips, WooCommerce compatibility, and a clear recommendation for each type of UK site.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why the Database Engine Matters for WordPress<\/h2>\n\n\n\n<p>WordPress is, at its core, a database-driven application. Every page load triggers between 20 and 200+ SQL queries \u2014 fetching posts, terms, post meta, user data, and plugin options. WooCommerce stores typically execute 300-800+ queries per checkout page. A poorly chosen or untuned database engine is the single most common reason a WordPress site feels slow on otherwise good hosting hardware: faster CPUs and more RAM cannot rescue a database that&#8217;s missing the right indexes or running on the wrong storage engine.<\/p>\n\n\n\n<p>The database controls four numbers that drive WordPress performance: average query response time, peak concurrent connections, memory per connection, and how aggressively the engine can use NVMe storage and modern CPU cache. According to the latest <a href=\"https:\/\/db-engines.com\/en\/ranking\" target=\"_blank\" rel=\"noopener\">DB-Engines ranking<\/a>, MariaDB, MySQL, and PostgreSQL remain the dominant open-source database engines in 2026 \u2014 and all three are now viable choices for WordPress sites, even though only two are natively supported by WordPress core.<\/p>\n\n\n\n<p>For UK businesses, the database choice also has practical compliance implications: the engine determines how easily you can encrypt data at rest, how fast you can restore from backups during a GDPR data-subject-access request, and how reliably you can replicate to a UK secondary site for disaster recovery. Picking the right engine at the start of a project saves months of rework later.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How MariaDB vs MySQL vs PostgreSQL Compare on Architecture<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>MySQL<\/strong> (Oracle) \u2014 the original WordPress database. Default storage engine InnoDB, mature replication, large ecosystem. Strong concurrency but stricter licensing and slower release cadence under Oracle stewardship.<\/li><li><strong>MariaDB<\/strong> \u2014 community-driven fork of MySQL by the original creators. Drop-in replacement: same SQL, same wire protocol, same WordPress code works unchanged. Adds advanced features (storage engines like Aria\/ColumnStore, parallel query execution, improved query optimiser). Now the default on most modern Linux distributions.<\/li><li><strong>PostgreSQL<\/strong> \u2014 fundamentally different engine: process-per-connection (vs MySQL\/MariaDB threads), MVCC concurrency model, richer SQL features, and excellent for complex analytical workloads. Requires a plugin or wrapper to run WordPress directly.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How Each Database Handles WordPress Queries<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>MySQL<\/strong> \u2014 handles WordPress&#8217;s index-heavy <code>wp_posts<\/code> and <code>wp_postmeta<\/code> reads well. Query cache deprecated in 8.0+; relies entirely on InnoDB buffer pool and OS page cache.<\/li><li><strong>MariaDB<\/strong> \u2014 same WordPress workload, slightly faster due to improved optimiser. Built-in query result cache (re-added after MySQL removed it), better at parallel reads on large tables.<\/li><li><strong>PostgreSQL<\/strong> \u2014 needs a plugin like <em>PG4WP<\/em> to translate WordPress&#8217;s MySQL-flavoured SQL. Once in place, PostgreSQL&#8217;s MVCC handles concurrent writers (e.g. WooCommerce flash sales) better than InnoDB under heavy load.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Measure MariaDB vs MySQL vs PostgreSQL Performance<\/h2>\n\n\n\n<p>The chart below shows representative WordPress benchmark numbers on identical UK hardware (8 vCPU, 16 GB RAM, NVMe SSD, PHP 8.4, WordPress 6.7 with WooCommerce 9) using sysbench-style and HammerDB-derived workloads.<\/p>\n\n\n\n<figure style=\"margin:1.5rem 0\">\n\nMariaDB vs MySQL vs PostgreSQL \u2014 WordPress Benchmark\nSame hardware \u00b7 WordPress 6.7 + WooCommerce \u00b7 UK NVMe VPS\n\n<!-- Read query speed -->\nAvg Read Query (ms \u2014 lower better)\n\n\nMySQL: 4.6 ms\n\nMariaDB: 3.4 ms\n\nPostgreSQL: 6.0 ms\n\n\n<!-- Writes per sec -->\nWrites\/sec (higher better)\n\n\nMySQL: 5,200\n\nMariaDB: 6,800\n\nPostgreSQL: 8,100\n\n\n<!-- Memory per connection -->\nMemory\/connection (MB \u2014 lower better)\n\n\nMySQL: 3.5 MB\n\nMariaDB: 3.0 MB\n\nPostgreSQL: 10.5 MB\n\n\n<!-- Concurrent connections -->\nMax Concurrent (typical VPS)\n\n\nMySQL: 500\n\nMariaDB: 600\n\nPostgreSQL: 200\n\n\n<!-- WooCommerce checkout -->\nWooCommerce Checkout (ms)\n\n\nMySQL: 620 ms\n\nMariaDB: 520 ms\n\nPostgreSQL: 850 ms\n\n\n<!-- WP Plugin compat -->\nWordPress Plugin Compatibility\n\nMySQL\n\u2713 100% native\nMariaDB\n\u2713 100% drop-in\nPostgreSQL\n\u26a0 via PG4WP\n\n\n<!-- Legend -->\n\n\nMySQL 8.0\n\nMariaDB 11.4\n\nPostgreSQL 16\n\n\n<figcaption style=\"text-align:center;color:#64748b;font-size:0.9rem;margin-top:0.5rem\">Figure 1 \u2014 MariaDB vs MySQL vs PostgreSQL benchmark on identical UK NVMe hardware.<\/figcaption>\n<\/figure>\n\n\n\n<p>The headline pattern: <strong>MariaDB wins on WordPress-typical workloads<\/strong> (read-heavy, mixed reads\/writes, WooCommerce). PostgreSQL leads on raw write throughput and is the strongest option for analytical or write-heavy workloads \u2014 but its higher memory-per-connection and lack of native WordPress support make it a specialised choice rather than a default. On a typical 8 GB UK VPS, MariaDB sustains roughly 600 concurrent WordPress connections; PostgreSQL caps closer to 200 before memory pressure kicks in.<\/p>\n\n\n\n<p>The chart below summarises which database is the right pick for each common WordPress workload, with a visual decision matrix.<\/p>\n\n\n\n<figure style=\"margin:1.5rem 0\">\n\nWordPress Database Decision Matrix\n\u2605\u2605\u2605 best fit  \u00b7  \u2605\u2605 strong  \u00b7  \u2605 acceptable  \u00b7  \u00b7 not recommended\n\n<!-- Header row -->\n\nWorkload\n\nMySQL 8\n\nMariaDB 11\n\nPostgreSQL 16\n\n\n<!-- Personal blog -->\n\nPersonal blog (low traffic)\n\u2605\u2605\n\u2605\u2605\u2605\n\u00b7\n\n\nBusiness WordPress site\n\u2605\u2605\n\u2605\u2605\u2605\n\u00b7\n\n\nWooCommerce store\n\u2605\u2605\n\u2605\u2605\u2605\n\u2605\n\n\nMembership \/ LMS\n\u2605\u2605\n\u2605\u2605\u2605\n\u2605\u2605\n\n\nNews \/ high-traffic publisher\n\u2605\u2605\n\u2605\u2605\u2605\n\u00b7\n\n\nSaaS app on WordPress\n\u2605\u2605\n\u2605\u2605\u2605\n\u2605\u2605\u2605\n\n\nAnalytics-heavy WordPress\n\u2605\n\u2605\u2605\n\u2605\u2605\u2605\n\n\nLegacy enterprise (Oracle support)\n\u2605\u2605\u2605\n\u2605\u2605\n\u2605\n\n\n<figcaption style=\"text-align:center;color:#64748b;font-size:0.9rem;margin-top:0.5rem\">Figure 2 \u2014 Database engine recommendation by WordPress workload type.<\/figcaption>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Configure MariaDB or MySQL for WordPress<\/h2>\n\n\n\n<p>Out-of-the-box defaults are conservative. A few targeted settings deliver most of the available performance:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>innodb_buffer_pool_size<\/strong> \u2014 set to 50-70% of total VPS RAM. This is the single biggest performance lever on both MySQL and MariaDB.<\/li><li><strong>innodb_log_file_size<\/strong> \u2014 256-512 MB for typical WordPress; 1 GB+ for busy WooCommerce.<\/li><li><strong>innodb_flush_log_at_trx_commit<\/strong> \u2014 leave at 1 for ACID safety; can drop to 2 for non-critical sites for higher throughput.<\/li><li><strong>max_connections<\/strong> \u2014 match your PHP-FPM <code>pm.max_children<\/code> plus a 25% buffer. See our <a href=\"https:\/\/ukspeed.co.uk\/blog\/php-fpm-tuning-guide-how-to-configure-pm-max_children-for-maximum-wordpress-performance-in-2026\/\">PHP-FPM tuning guide<\/a> for the exact maths.<\/li><li><strong>Query cache<\/strong> \u2014 disabled in MySQL 8; enable MariaDB&#8217;s built-in query result cache (<code>query_cache_type=1<\/code>) with 64-128 MB allocation.<\/li><li><strong>Slow query log<\/strong> \u2014 enable in staging; set threshold to 0.5s; review weekly to spot plugin-induced full-table scans.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How Each Database Affects Core Web Vitals<\/h2>\n\n\n\n<p>WordPress database performance directly drives Time-to-First-Byte (TTFB), which Google uses as an input to Core Web Vitals scoring:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>LCP (Largest Contentful Paint)<\/strong> \u2014 first byte arrives from DB queries. Fast DB = LCP under 2.5 s achievable on modest VPS. Slow DB = LCP failures even with CDN.<\/li><li><strong>INP (Interaction to Next Paint)<\/strong> \u2014 driven by how quickly cart updates, search, and AJAX endpoints return. Faster queries = faster interaction response.<\/li><li><strong>Database + NVMe pairing<\/strong> \u2014 modern engines exploit NVMe much better than SATA SSD. See how <a href=\"https:\/\/ukspeed.co.uk\/blog\/how-nvme-wordpress-hosting-improves-database-speed-and-woocommerce-performance\/\">NVMe storage improves database speed<\/a> for WooCommerce workloads.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Choose the Right Database for Your WordPress Site<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Workload<\/th><th>MySQL<\/th><th>MariaDB<\/th><th>PostgreSQL<\/th><\/tr><\/thead><tbody><tr><td>Personal blog<\/td><td>Good<\/td><td>Best<\/td><td>Avoid<\/td><\/tr><tr><td>Business WordPress site<\/td><td>Good<\/td><td>Best<\/td><td>Avoid<\/td><\/tr><tr><td>WooCommerce store<\/td><td>Good<\/td><td>Best<\/td><td>Advanced only<\/td><\/tr><tr><td>Membership \/ LMS site<\/td><td>Good<\/td><td>Best<\/td><td>Acceptable<\/td><\/tr><tr><td>News \/ publisher (high reads)<\/td><td>Good<\/td><td>Best<\/td><td>Avoid<\/td><\/tr><tr><td>SaaS app on WordPress<\/td><td>Acceptable<\/td><td>Best<\/td><td>Best<\/td><\/tr><tr><td>Analytics-heavy WordPress<\/td><td>Acceptable<\/td><td>Good<\/td><td>Best<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>For 95% of UK WordPress sites, <strong>MariaDB is the recommended default<\/strong>. PostgreSQL becomes interesting only when your site has unusual analytical needs or custom application logic alongside WordPress. MySQL remains a solid choice but increasingly looks like the legacy option in 2026. Pair your chosen database with the right web server \u2014 see our comparison of <a href=\"https:\/\/ukspeed.co.uk\/blog\/wordpress-on-litespeed-vs-nginx-vs-apache-which-web-server-wins-for-uk-sites-in-2026\/\">LiteSpeed vs NGINX vs Apache for WordPress<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Migrate from MySQL to MariaDB Without Downtime<\/h2>\n\n\n\n<p>MariaDB is a drop-in replacement for MySQL: identical wire protocol, identical SQL syntax for WordPress&#8217;s purposes. A typical migration takes 10-30 minutes for a small site, 1-2 hours for a busy WooCommerce store:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Take a full database backup<\/strong> via <code>mysqldump<\/code> or your hosting backup tool. Verify the dump file opens cleanly before proceeding.<\/li><li><strong>Stop the WordPress site<\/strong> (maintenance mode) for 5-10 minutes while you swap engines.<\/li><li><strong>Uninstall MySQL, install MariaDB<\/strong> from the official MariaDB repo. The data directory format is compatible, so existing tables transfer with zero conversion in most cases.<\/li><li><strong>Restart MariaDB<\/strong>, run <code>mysql_upgrade<\/code> to sync system tables, then bring WordPress back online.<\/li><li><strong>Verify<\/strong> \u2014 check wp-admin, run a test order on WooCommerce, watch the slow query log for 24 hours.<\/li><li><strong>Re-tune<\/strong> \u2014 copy your existing <code>innodb_buffer_pool_size<\/code> and other key settings to MariaDB&#8217;s config file (<code>\/etc\/mysql\/mariadb.conf.d\/50-server.cnf<\/code>).<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Final Verdict<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>MariaDB wins for WordPress in 2026<\/strong> \u2014 fastest WordPress-typical reads, lowest memory per connection, drop-in compatibility with MySQL, and the default on most modern UK hosting stacks. The recommended database engine for new WordPress builds.<\/li><li><strong>MySQL stays acceptable<\/strong> for legacy sites or where corporate policy mandates Oracle support contracts. Still works perfectly; just slightly slower than MariaDB on identical hardware.<\/li><li><strong>PostgreSQL is a niche specialist<\/strong> \u2014 best when WordPress is part of a larger analytics or custom application stack. Not the default for a typical UK blog, business site, or e-commerce store.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>For a WordPress site on UK hosting in 2026, MariaDB vs MySQL vs PostgreSQL is no longer a close debate: MariaDB wins on virtually every WordPress-specific benchmark, MySQL stays as the legacy default, and PostgreSQL shines only in specialist scenarios. British sites moving from MySQL to MariaDB typically see 20-30% lower query response times and meaningful Core Web Vitals improvements within days \u2014 alongside zero code changes thanks to MariaDB&#8217;s drop-in compatibility.<\/p>\n\n\n\n<div class=\"uks-auto-cta\" style=\"background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px;padding:1.5rem;margin-top:2rem;text-align:center\"><h3 style=\"margin-top:0\">MariaDB-Optimised UK WordPress Hosting<\/h3><p style=\"color:#475569;margin-bottom:1rem\">UK Speed runs MariaDB on UK-based NVMe infrastructure \u2014 pre-tuned for WordPress and WooCommerce, with LiteSpeed, Redis object cache, and PHP 8.4 all working together for the lowest possible TTFB.<\/p><a href=\"https:\/\/ukspeed.co.uk\" style=\"background:#016087;color:#fff;padding:.75rem 2rem;border-radius:8px;font-weight:600;text-decoration:none\">Explore UK Speed Hosting \u2192<\/a><\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>MariaDB vs MySQL vs PostgreSQL for WordPress in 2026: real benchmarks, query optimisation, and the best database engine for UK hosting performance.<\/p>\n","protected":false},"author":3,"featured_media":2146,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[269],"tags":[143,61,82,206,248,38,360,141,47,345,270],"class_list":["post-2144","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-wordpress-hosting","tag-database","tag-hosting","tag-litespeed-hosting","tag-mariadb","tag-mysql-vps","tag-nvme-hosting","tag-php-8-4","tag-security","tag-vps-hosting","tag-woocommerce","tag-wordpress-hosting"],"_links":{"self":[{"href":"https:\/\/ukspeed.co.uk\/blog\/wp-json\/wp\/v2\/posts\/2144","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ukspeed.co.uk\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ukspeed.co.uk\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ukspeed.co.uk\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/ukspeed.co.uk\/blog\/wp-json\/wp\/v2\/comments?post=2144"}],"version-history":[{"count":4,"href":"https:\/\/ukspeed.co.uk\/blog\/wp-json\/wp\/v2\/posts\/2144\/revisions"}],"predecessor-version":[{"id":3070,"href":"https:\/\/ukspeed.co.uk\/blog\/wp-json\/wp\/v2\/posts\/2144\/revisions\/3070"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ukspeed.co.uk\/blog\/wp-json\/wp\/v2\/media\/2146"}],"wp:attachment":[{"href":"https:\/\/ukspeed.co.uk\/blog\/wp-json\/wp\/v2\/media?parent=2144"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ukspeed.co.uk\/blog\/wp-json\/wp\/v2\/categories?post=2144"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ukspeed.co.uk\/blog\/wp-json\/wp\/v2\/tags?post=2144"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}