Скачать или смотреть 📌 Data Concurrency and Deadlocks. DAY-9

📌 In this Oracle DBA tutorial, we explore a critical real-time concept: **Data Concurrency and Deadlocks**.

🧠 Understand how Oracle handles multiple users accessing the same data (Concurrency), and what happens when sessions block each other (Deadlocks).

📌 Topics Covered:
00:00 – Introduction
01:00 – What is Data Concurrency?
02:45 – Oracle Locking Mechanism (TX, TM)
04:30 – Undo, Redo & MVCC
06:10 – What is a Deadlock?
07:40 – Real-Time Deadlock Simulation (Session A & B)
10:20 – Detecting Deadlocks (V$SESSION, DBA_BLOCKERS, DBA_WAITERS)
12:15 – Deadlock Error ORA-00060 Explained
13:30 – Trace File & Alert Log Analysis
14:50 – Best Practices to Avoid Deadlocks
16:30 – ORA-00054 Resource Busy – Real-Time Use Case
18:00 – How to Find Which Table is Locked (Script)
19:00 – How Oracle Resolves Deadlocks Automatically
20:30 – Q&A and Real-Time Scenarios

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📂 Download PPT & SQL Scripts:https://docs.google.com/presentation/...


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