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Expensive SQL on Exadata 26.1: Read the Offload Numbers Before You Build the Index

The Exadata ticket we see most often is not about a slow query. It is about a cluster that runs hot for hours, an IORM plan that somebody keeps re-tuning, and a licence conversation about [...]

SQL Server 2025 Expensive Queries: 7 Proven Ways to Find and Fix Them by Latency and Resource Cost

"Expensive queries" is a phrase that hides two different problems. One is response time: a statement the application waits too long for. The other is resource efficiency: a statement that burns CPU, logical reads and [...]

Db2 13 for z/OS Index Efficiency: 8 Proven Troubleshooting Techniques

Most index efficiency problems on Db2 13 for z/OS are not I/O problems. They are CPU problems that look like I/O problems from a distance. Index efficiency is measured in getpages, and a four-level index [...]

PostgreSQL Wait Event Analysis: Finding Bottlenecks with pg_stat_activity

PostgreSQL wait events explained: sample pg_stat_activity, interpret Lock, LWLock, IO and Client waits, and turn wait profiles into targeted fixes.

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MySQL Replication Monitoring: Enhanced Features for the Enterprise Edition

MySQL Replication Monitoring is a critical operational discipline — and in MySQL Enterprise Edition, it is also a substantially more capable one. MySQL replication has long served as the backbone of high-availability architectures, disaster recovery [...]

Datadog PostgreSQL Observability

Practical Datadog PostgreSQL guide with working SQL examples, EXPLAIN ANALYZE walkthroughs, configuration tips, and production guardrails for PostgreSQL cl.

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Building a PostgreSQL on-call runbook

Practical PostgreSQL on call guide with working SQL examples, EXPLAIN ANALYZE walkthroughs, configuration tips, and production guardrails for PostgreSQL cl.

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