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Read practical Oracle DBA, cloud, database engineering, and certification articles.
Oracle EBS 12.2.15 Upgrade Deep Dive: ADOP Internals, Delta 17, ETCC Validation, WebLogic PSU, and Zero-Downtime Patching Strategy
Learn how to upgrade Oracle EBS to Release 12.2.15 using ADOP, Delta 17, ETCC, WebLogic PSU updates, Oracle Database 19c/26ai, and real Apps DBA troubleshooting techniques.
Oracle Database 26ai: Fixing SQL Plan Regression After an Upgrade Using SQL Tuning Advisor, SQL Profiles, and SQL Plan Baselines
A SQL query became 40x slower after an Oracle Database upgrade. Learn how to diagnose and fix SQL plan regression using SQL Tuning Advisor, SQL Profiles, and SQL Plan Baselines in Oracle Database 26ai.
Oracle EBS 12.2.14: How Bind Variable Peeking Silently Destroyed Query Performance Root Cause, Diagnosis, and Permanent Fix
An Oracle EBS query ran fast for some users and slow for others. Learn how bind variable peeking caused wrong execution plans and how to fix it permanently.
Oracle Database 26ai: How a Missing Histogram Turned a 3-Second Query Into a 4-Minute Crisis Complete Statistics Diagnosis and Fix
A SALES table query slowed from 3 seconds to 4 minutes due to a missing histogram. Learn how to diagnose and fix Oracle optimizer statistics issues using real DBA techniques.
Oracle EBS 12.2.14 on Oracle Database 26ai: Diagnosing and Fixing a Wrong Join Method
A slow Oracle EBS order summary query ran for 38 seconds instead of sub-second. Learn how to diagnose and fix wrong join methods using DBMS_XPLAN, E-Rows vs A-Rows, and EBS DBA troubleshooting.
Oracle EBS on Oracle Database 26ai: Diagnosing and Fixing Wrong Access Path Choices Full Table Scan vs Index Scan
A slow Oracle EBS order query taking 50 seconds instead of sub-second. Learn how to diagnose and fix access path issues using execution plans and DBA techniques.
Oracle Execution Plans in Oracle 26ai: How to Read Them, Why They Change, and How to Fix Bad Plans Fast
Learn how to read and fix Oracle execution plans using DBMS_XPLAN, E-Rows vs A-Rows analysis, and real DBA troubleshooting in Oracle 26ai.
Oracle 26ai In-Memory Performance Issue: Why Tables Are Not Populating and How to Fix It
Facing Oracle 26ai In-Memory performance issues? Learn how to troubleshoot tables not populating in IM Column Store with real DBA commands and fixes.
Why Oracle Database 26ai Hard Parses Are Destroying Your Performance And How to Stop Them
A production OLTP system that handled 150 concurrent users suddenly struggles at 60. Response times triple. CPU spikes. No new code was deployed. The cause? A single application change stopped using bind variables triggering thousands of hard parses per minute. In this post, I break down exactly how Oracle processes SQL internally, why hard parses are so destructive, how to diagnose them with real queries against VSQLandVSQL and V SQLandVSYSSTAT, and how to fix them permanently. Based on the Oracle AI Database SQL Tuning Guide (26ai) and real production experience.
Why Your Oracle SQL Is Slow and How to Fix It: A Practical DBA Guide to SQL Tuning in Oracle 26ai
SQL tuning is the iterative process of diagnosing and repairing SQL statements that fail to meet a performance standard. But knowing where to start is harder than it sounds. In this first post of a 12-part series based on the Oracle AI Database SQL Tuning Guide (26ai), I walk through the complete SQL tuning framework the six tuning tasks every DBA must know, every major tool available, the difference between hard and soft parsing, and the application design decisions that create performance problems before a single query runs. With working code, real diagnostics, and DBA insight from production experience.
Oracle 26ai Manual In-Memory Configuration: INMEMORY Clause Deep Dive, Compression, and Column-Level Control
Learn Oracle 26ai manual In-Memory configuration using the INMEMORY clause, compression strategies, and column-level tuning for maximum performance.
Learn Oracle database 26ai Automatic In-Memory (AIM) Deep Dive: Heat Map, ADO Policies, and Intelligent Memory Management
Learn Oracle Automatic In-Memory (AIM), Heat Map, and ADO policies to optimize memory usage and improve query performance in Oracle Database In-Memory.
How to Enable and Size Oracle In-Memory Column Store: Configuration, Memory Planning, and Best Practices
Learn how to enable and size Oracle In-Memory Column Store with real DBA commands, memory planning strategies, and performance best practices.
Learn Oracle database 26ai In-Memory Process Architecture: IMCO, Worker Processes, and Population Lifecycle Explained
Learn Oracle In-Memory process architecture including IMCO, worker processes, and population lifecycle for efficient memory management and performance tuning.
Learn Oracle database 26ai In-Memory Column Store Internals: IMCU, SMU, and Compression Explained
Explore Oracle In-Memory Column Store internals including IMCU, SMU, and compression units with DBA-level insights and performance optimization techniques.
Learn Oracle database 26ai In-Memory Architecture Overview: Dual Format, IM Column Store, and Internal Design
Learn Oracle Database In-Memory architecture, dual format storage, and IM Column Store internals for high-performance analytics and query optimization.
Oracle EBS 12.2 Performance Tuning Guide: JVM Optimization, oacore Scaling, and Middleware Best Practices
Optimize Oracle EBS 12.2 performance with JVM tuning, oacore scaling, and middleware best practices for faster response and stable production systems.
Oracle EBS 12.2 ADOP Troubleshooting Guide: Fix Online Patching Failures and Recovery Strategies
Learn how to troubleshoot Oracle EBS 12.2 ADOP failures, fix patch errors, and recover online patching with real DBA commands and strategies.
Oracle E-Business Suite 12.2 Online Patching Deep Dive: ADOP Internals, Dual File System Architecture, and Zero-Downtime Strategy
This article explores Oracle E-Business Suite 12.2 online patching from an Apps DBA perspective, covering dual file system architecture, ADOP lifecycle, Edition-Based Redefinition, and advanced performance tuning techniques for achieving near zero-downtime patching in production environments.
Automating Oracle EBS Health Checks Using SQL, Shell Scripts, and Oracle APEX Dashboard
A modern architectural approach to Oracle EBS monitoring and reporting by integrating database metrics, application server health, and Oracle APEX dashboards to replace legacy reporting systems.
How to Upgrade Oracle EBS 12.2 to the Next Generation Technology Stack: A Real-World DBA Guide
Most Oracle EBS upgrade guides explain what to do. This one explains what actually goes wrong and how to prevent it. Drawing from real-world DBA experience and Oracle's 2025 technology roadmap, this post walks you through every step of migrating Oracle EBS 12.2 from the Classic Technology Stack (WLS 10.3.6, FMW 11g, JDK 7) to the Next Generation stack (WLS 14c, FMW 14c, JDK 17) from environment readiness checks and manifest generation to online patching, CUTOVER, and file system synchronization. Built for DBAs who need to get this right the first time.