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Databases & messaging · #mariadb
Detect split‑brain in MariaDB Galera Cluster by checking wsrep_cluster_status, network connectivity, and gcache, then apply the appropriate fix or escalate.
Stop building manual audit logs. Learn how MariaDB system-versioned temporal tables automate data history and point-in-time recovery with minimal code.
Learn how to choose between INSTANT, INPLACE, and COPY algorithms in MariaDB to perform schema changes on InnoDB tables without causing application downtime.
MariaDB system-versioned tables retain every historical row version automatically, replacing hand-rolled trigger-based audit tables with a single DDL clause and point-in-time SQL queries.
Identify the offending queries in MariaDB deadlock traces, fix missing indexes or long transactions, and know when to escalate.
I have a process that exports the data from an AWS RDS MariaDB using mysqldump which has been running succesfully in a docker-image on Concourse for years. Since two nights ago the process has started failing with the error: mysqldump: Couldn't execute 'FLUSH TABLES WITH READ LOCK': Access denied for user 'admin'@'%' (using password: YES) (1045) The official
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