Mini DBA Blog | All posts by admin

Troubleshoot PostgreSQL write slowdowns, WAL growth and vacuum debt by checking old transactions, replication retention and table churn....

Find PostgreSQL blocking sessions with pg_blocking_pids, understand transaction age, and resolve migration or application lock queues safely....

Use PostgreSQL wait events and session state to diagnose slow queries, distinguish lock and I/O delays, and spot idle transaction problems....

Diagnose PostgreSQL high CPU using query statistics, row estimates and concurrency evidence, with practical checks for plan regressions....

Compare MySQL monitoring on Amazon RDS, Azure Flexible Server and Cloud SQL, including I/O metrics, connection counts and visibility gaps....

Investigate MySQL connection errors and memory pressure by separating idle pools, active work, transaction leaks and per-session memory demand....

Find the cause of MySQL disk I/O pressure using buffer-pool read deltas, query access paths, storage latency and write-workload evidence....

Diagnose recurring MySQL deadlocks using the deadlock report, index access and transaction order, then verify retry behaviour under concurrent load....

Investigate slow MySQL queries with low CPU using lock waits, transaction age and I/O evidence, with a worked blocking example....

Troubleshoot MySQL high CPU with statement digests, rows examined, execution plans and concurrency checks before resizing your database server....