Learn how Oracle RMAN (Recovery Manager) works under the hood to streamline and secure your database backups. This in-depth guide covers RMAN architecture, block-level backup advantages, internal components like DBMS_RCVMAN and DBMS_BACKUP_RESTORE, channel operations, and integration with third-party media management solutions (SBT, MML). Perfect for...
Discover how Oracle ASM simplifies storage management for Oracle RAC by using disk groups, mirroring strategies, and intelligent striping. Learn how it enhances performance, availability, and scalability while reducing downtime—critical for any 19c deployment. Whether you’re a DBA or architect, this blog demystifies ASM’s inner...
Learn why dropping indexes on Oracle Exadata isn't always the best move. Explore how Smart Scan and Storage Indexes work, when they fall short, and how to safely evaluate index impact without hurting performance....
Learn how to trace and analyze problematic sessions using Oradebug and TKPROF in Oracle 19.25.0.0. Quick steps, real-world example, and insights to help you troubleshoot high I/O or wait events....
Ran into a DB creation failure (DBAAS-60022) while provisioning an Oracle 23ai DB on ExaCC (Image 25.1.3). After digging through logs and a bit of head-scratching, the root cause turned out to be a Java version mismatch — DBCA was compiled with Java 11, but...
Understanding Oracle's data consistency mechanisms is key to ensuring reliable database operations. Even after a commit, changes may not be immediately written to the datafiles due to Oracle’s DBWn process. Instead, Oracle relies on the Online Redo Log to recover committed transactions in the event...
Learn the fundamentals of Oracle Database architecture in this beginner-friendly guide. Discover how Oracle instances work, including essential memory structures like SGA, PGA, UGA, and key background processes such as PMON, SMON, DBW, and LGWR. Perfect for new DBAs, developers, and anyone starting their journey...
New to Oracle? This Back-To-Basics guide breaks down the Oracle Database Server architecture—explaining the physical and logical components, key files, and how the instance works. Perfect for aspiring DBAs looking to build a solid foundation....
In this post we will look at the Online Redo Log which consists of physical files that store redo records, capturing changes made to the database. These records are crucial for the recovery process, as they facilitate "roll forward" of committed changes and "roll back"...
In this back-to-basics we go into what a database instance is. We view key components like the System Global Area (SGA) and background processes such as PMON and DBWn that ensure efficient memory management and data integrity. Understanding instances is crucial for database performance and...