Planet MySQL HA Blog

MySQL system variables configure the server's operation, and the SET statement is used to change system variable. The MySQL SET statements have various options for specifying changes to SYSTEM VARIABLE. It’s important to understand how these changes are reflected in current sessions (connections), later sessions, and after database server restarts.

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WePay, the integrated payments arm of JPMorgan Chase, has taken significant strides to enhance its database infrastructure by upgrading to MySQL Enterprise Edition. For businesses looking to optimize their payment infrastructure, the journey of WePay serves as an insightful case study on leveraging advanced database solutions for maximum uptime and security.

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MySQL 8.3 introduced a new JSON format for EXPLAIN reflecting how the execution plan actually is built, allowing for programmatic analysis of plans and executions.

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We have documented streaming replication, and we have also mentioned how you can use streaming replication, and we also once did a webinar with recording on it, and we wrote a very in-depth blog post on how to use streaming replication to manage large transactions with Galera Cluster.

However, we had a question recently about streaming replication around the usage of wsrep_trx_fragment_unit and wsrep_trx_fragment_size (also, well documented).

So we have a usual 3-node Galera Cluster, and here is

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How using SET ROLE can be used to define a “Least Privilege” model for accessing database objects based on a user’s current task.

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For people to prepare for their travel to Belgium, we want to announce that the preFOSDEM fringe event known as the MySQL Belgian Days will take place the Thursday and Friday, January 30 and 31, before FOSDEM.

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MySQL 8.4 introduces a new privilege, FLUSH_PRIVILEGES, which allows database users to execute FLUSH PRIVILEGES statement without the need of RELOAD privilege.

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MySQL 9.1 adds support for Windows Hello. And this supports passkeys stored on the OS store. Check how to set up and use one of these instead of the hardware based FIDO2 devices

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Starting with MySQL 9.0, users of HeatWave MySQL can now try the new hypergraph optimizer. Read on to learn how to enable the hypergraph optimizer, and to understand what it means for your query plans.

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