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BigDBA – Database,Devops,Big Data,Cloud & Oracle Blog

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A Practical Deployment Guide: EDB BDR with ZFS Storage

This guide shows you how to set up EDB BDR (which lets you write to all servers) using ZFS for your storage. We include sample outputs to help you follow along.

ZFS is a great choice here. It’s from Oracle and helps protect your data, much like ASM. It checks for errors (checksumming) and prevents broken data blocks (“torn pages”). This makes your database setup ver...

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Concurrency Deep Dive: PostgreSQL (Tuples & VACUUM) vs. Oracle (Undo & Consistent Read)

This document provides a clear comparison of the concurrency control models in PostgreSQL and Oracle. While both databases use MVCC, their implementation is fundamentally different. Understanding this is key to managing performance. We’ll dive into the core differences, from PostgreSQL’s Heap Tuple (t_xmin/t_...

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An Oracle ACE Deep Dive: Solving the "100% Unused Large Pages” Mystery

You’ve seen it in your alert.log or a system message—a cryptic warning hinting at “unused large pages.” First, let’s correct the common typos and interpret the message. The warning: unused large pages exist system wide at or near 100% means that your Linux operating system has dutifully allocated a large chunk of RAM as HugePages, but your Oracle database instanc...

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AI-Driven PostgreSQL Performance Tuning: The Open-Source LLM and MCP Guide

Introduction: Elevating Database Operations with Open-Source AI

The complexity of PostgreSQL performance tuning demands a modern solution. We’ve established that the Model Context Protocol (MCP), via the Postgres MCP Pro Server, provides a crucial bridge between your database and an AI agent.

To complete this “turnkey”</s...

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PostgreSQL Red Flags: Expert Guide to Database Anti-Patterns & Essential Extensions

As a seasoned DBA with years deep in the PostgreSQL trenches, I’ve learned that database problems rarely appear out of nowhere. They are the result of small, seemingly harmless decisions that accumulate over time. These are the “red flags”—symptoms of deeper, systemic issues in your architecture. But sometimes, the biggest red flag of all is simply not knowing the incredible ...

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