Optimizing Undo Retention in Oracle Databases: A Practical Guide
May 12, 2024 · 2 min read · Database Administration SQL Commands Performance Optimization Data Management undo_retention oracle dba ·Optimizing Undo Retention in Oracle Databases We will explain how to optimize the undo_retention parameter in Oracle databases using the SQL command ALTER SYSTEM SET undo_retention = 500 SCOPE = MEMORY;. Understanding this parameter is crucial for effective transaction management, rollback capabilities, and maintaining …
Read MoreOracle Undo, A Deep Dive into DBA_UNDO_EXTENTS
May 11, 2024 · 3 min read · Oracle Database Database Administration Performance Tuning SQL Troubleshooting ·Oracle Undo: A Deep Dive into DBA_UNDO_EXTENTS Unlock the secrets of Oracle's undo mechanism with this in-depth guide to the DBA_UNDO_EXTENTS view. Learn how to analyze undo tablespace usage, interpret extent statuses (ACTIVE, UNEXPIRED, EXPIRED), and gain valuable insights for proactive database management. Avoid …
Read MoreReal-Time Oracle Rollback Detection, Is Your Database Undoing Changes?
May 10, 2024 · 3 min read · Oracle Database SQL Database Administration Performance Tuning Troubleshooting v$session v$transaction ·Real-Time Oracle Rollback Detection: Is Your Database Undoing Changes? This SQL query monitors real-time rollbacks in Oracle databases. It identifies which sessions are actively undoing changes and tracks their progress by observing the used_ublk value (the number of undo blocks in use). When used_ublk reaches zero, …
Read MoreUnderstanding Rollback Segments in Oracle Databases
Understanding Rollback Segments in Oracle Databases Rollback segments are essential components of Oracle databases, providing a mechanism to reverse uncommitted transactions and maintain data consistency. This post presents a SQL query for inspecting rollback segments, as well as explanations and insights into their …
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