{"id":3608,"date":"2026-07-16T12:00:00","date_gmt":"2026-07-16T12:00:00","guid":{"rendered":"https:\/\/kedar.nitty-witty.com\/blog\/?p=3608"},"modified":"2026-07-16T06:43:41","modified_gmt":"2026-07-16T06:43:41","slug":"mysql-major-version-upgrade-checklist-how-to","status":"publish","type":"post","link":"https:\/\/kedar.nitty-witty.com\/blog\/mysql-major-version-upgrade-checklist-how-to","title":{"rendered":"MySQL Major Version Upgrade Checklist &#8211; how to"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">A MySQL major version upgrade is an inevitable change one must carry to progress their database journey. For those who&#8217;re bitten by bad upgrade must have felt the process is like black magic that only works when you sacrifice a server to the database gods.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In this article, I&#8217;m sharing the <strong>MySQL major version upgrade checklist<\/strong> that I personally follow before touching production systems. While the examples focus on MySQL replication, many of these upgrade best practices apply to MariaDB, Percona Server, and other MySQL-compatible databases as well.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I published a video explaining the complete <strong>MySQL upgrade workflow for replicated environments<\/strong>. It covered the overall process, but I never included the actual checklist. I was pointed at that and I am correcting that mistake. This article provides the complete checklist you can use during your own <strong>MySQL production upgrade<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There is no my way or high way. I&#8217;m not claiming this is the only way to upgrade MySQL. Different environments demand different approaches, but a good checklist almost always beats relying on memory.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Resources<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"http:\/\/kedar.nitty-witty.com\/blog\/wp-content\/uploads\/2026\/07\/MySQL_Upgrade_Checklist_Printable.pdf\" target=\"_blank\" rel=\"noopener nofollow\" title=\"\"><strong>Download: MySQL Major Version Upgrade Checklist (PDF)<\/strong><\/a><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"MySQL Major Version Upgrade Checklist (Zero Downtime Strategy)\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/LKilfCJI_y4?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Why MySQL Upgrade Checklist is important<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Look, you can upgrade MySQL. It&#8217;s not that hard. Hit the version bump and\u2026 it probably works. Except when it doesn&#8217;t. And when it doesn&#8217;t, you have no rollback plan, your application is screaming, and you&#8217;re just asking stupid AI and that may even blow away any chance of recovery. We need a plan.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">My checklist gives you steps you should follow to perform the safe upgrade. I am not saying it is the &#8220;only way&#8221; but it is surely &#8220;one way&#8221;.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">MySQL Upgrade Checklist details<\/h2>\n\n\n\n<h4 class=\"wp-block-heading\">PHASE 1: Upgrade Testing<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">STEP 1: Prerequisites &amp; Setup<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2610 Provision two identical test servers (test-mysql-1, test-mysql-2)<br>\u2610 Install current MySQL version on both test servers<br>\u2610 Restore production data backup to both instances<br>\u2610 Configure chained replication: production \u2192 test-mysql-1 \u2192 test-mysql-2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">STEP 2: MySQL Upgrade Checker<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2610 Install MySQL Shell on test-mysql-2<br>\u2610 Run checkForServerUpgrade() against the production database<br>\u2610 Document all compatibility issues, warnings, and deprecation notices<br>\u2610 Fix all identified compatibility issues before proceeding<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">STEP 3: Prepare for Test Upgrades<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2610 Apply checkForServerUpgrade() fixes on test-mysql-2<br>\u2610 Upgrade MySQL to target version on test-mysql-2<br>\u2610 Configure both servers with equivalent settings (except version-specific differences)<br>\u2610 Disconnect replication \u2014 both servers now hold independent identical datasets<br>\u2610 Log all upgrade learnings: my.cnf changes, steps taken, issues encountered<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">STEP 4: Performance Testing (pt-upgrade)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2610 Collect at least 24 hours of slow query logs from production-mysql<br>\u2610 Run pt-upgrade tool in read-only mode against both instances<br>\u2610 Enable read-write on both instances and re-run pt-upgrade for write workloads<br>\u2610 Analyse pt-upgrade output thoroughly<br>\u2610 Log issues: time differences, plan changes, result differences, errors, reserved keywords<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">STEP 5: Application Compatibility Testing<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2610 Test application against the target version on test-mysql-2<br>\u2610 Document any application-level issues or performance degradation<br>\u2610 Create an application update plan for all identified incompatibilities<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">PHASE 2: Upgrade Preparation<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">STEP 1: Issue Resolution<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2610 Apply all fixes identified during checkForServerUpgrade and pt-upgrade<br>\u2610 Implement all required database-level changes (config, authentication, etc.)<br>\u2610 Obtain go-ahead sign-off from the application team for the target version<br>\u2610 Re-test all fixes to confirm they fully resolve the issues (if required)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">STEP 2: Infrastructure &amp; Cutover Preparation<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2610 Provision production-grade candidate servers: candidate-prod-1, candidate-prod-2<br>\u2610 Restore production data and configure chained replication to candidate servers<br>\u2610 Upgrade candidate servers to target version using Phase 1 learnings<br>\u2610 Configure backups, monitoring, and validate restoration from backups<br>\u2610 Document the new environment and all cutover requirements<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">PHASE 3: Cutover<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">STEP 1: Pre-Cutover Activities<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2610 Verify replication is functioning properly with minimal lag and no errors<br>\u2610 Ensure latest full backups are available and validated<br>\u2610 Confirm all monitoring systems are active and functioning<br>\u2610 Notify all stakeholders of the upcoming maintenance window<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">STEP 2: Cutover Execution<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2610 Set current production database to read-only mode<br>\u2610 Verify replication has fully caught up \u2014 zero lag confirmed<br>\u2610 Disconnect replication from production to candidate-prod-1 (primary)<br>\u2610 Update application connection strings to point to candidate-prod-1 (writer)<br>\u2610 Enable read-write on candidate-prod-1 and start routing application traffic<br>\u2610 Run validation tests and make formal Go \/ No-Go decision<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">STEP 3: Post-Cutover Activities<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2610 Monitor application performance and error rates continuously<br>\u2610 Monitor database performance metrics in real-time<br>\u2610 Keep original environment available for potential rollback<br>\u2610 Collect performance metrics and compare with pre-upgrade baseline<br>\u2610 Notify stakeholders of successful upgrade completion<br>\u2610 Document any issues encountered and their resolutions<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">PHASE 4: Rollback Plan<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">STEP 1: Rollback Preparation<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2610 Assess whether reverse replication from candidate back to original is viable<br>\u2610 Establish application tolerance for possible data loss or restore delay<br>\u2610 Identify manual actions required if reverse replication is not possible<br>\u2610 Define specific triggers that would initiate a rollback decision<br>\u2610 Establish and communicate decision-making authority for rollback<br>\u2610 Prepare and test rollback scripts and procedures<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">STEP 2: Rollback Execution (If Needed)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2610 Update application connection config to point back to original production<br>\u2610 Return original production database to read-write mode<br>\u2610 Verify application functionality against the original database<br>\u2610 Notify stakeholders of the rollback and expected resolution timeline<br>\u2610 Document the specific issues that triggered the rollback<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you have questions, shooot. I&#8217;d love to hear about your upgrade stories or your own checklist.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Happy upgrading.<\/p>\n","protected":false},"excerpt":{"rendered":"This article provides MySQL Major Version Upgrade Checklist along with video, one may follow to ease the upgarde task. 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