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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 [...]

Polyglot Persistence: The Proven Case for 5 Data Models

Your transactional database is not failing you. It is doing precisely what it was engineered to do: take a write, make it durable, isolate it from every other write, and never lie about it. The [...]

MongoDB Performance Tuning: From 1 ms to 100 µs

By the MinervaDB MongoDB Support Team There is a particular moment in database engineering that every serious team eventually faces — the moment when “fast enough” stops being fast enough. You have already indexed your […]

Connection Pooling Best Practices for MySQL at Scale

A principal database architect’s guide to MySQL connection pooling at scale: right-sizing application pools, ProxySQL multiplexing, tuning max_connections and timeouts, avoiding connection storms, and the metrics that actually matter.

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8 Proven Azure SQL Caching Strategies for Sub-Millisecond Response Times

Engineer Azure SQL for sub-millisecond response with a layered caching strategy — buffer pool, In-Memory OLTP, Azure Cache for Redis, columnstore, read replicas and Query Store, with runnable T-SQL. Need sub-ms latency on Azure SQL? MinervaDB delivers expert Azure SQL performance tuning, cloud DBA and 24×7 support.

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How to Diagnose Slow Queries in SAP HANA: A Step-by-Step Guide

A repeatable 8-step workflow for diagnosing slow SAP HANA queries — from baseline to root cause to validated fix — using the SQL Plan Cache, Expensive Statements Trace, EXPLAIN PLAN, PlanViz and the column-store and delta-merge views, with runnable SQL. Need it fixed now? MinervaDB delivers expert SAP HANA performance tuning, consulting and 24×7 Remote DBA.

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