ORACLE DATABASE

  In today’s landscape, protecting a database is no longer just about keeping people out, it’s about monitoring everything they do once they are in. Oracle AVDF is a comprehensive security platform that manages your entire database security posture, ensuring that your most sensitive information remains both private and compliant. What is Oracle AVDF? Oracle AVDF is a "software appliance" that combines two powerful security tools into one unified management console. Audit Vault: Acts as a secure, central "vault" for audit data. It collects logs from databases, operating systems, and even custom files, storing them in a tamper-proof repository. Database Firewall: Acts as a real-time "shield". It sits on the network, inspecting every SQL command before it hits your database to block unauthorized activity. Core Pillars of Modern Database Security 1. Database Security Posture Management (DSPM) Beyond just watching ...

Many businesses use a Primary Database for their main work and a Standby Database (Active Data Guard) for reports and data backups. This keeps the primary system fast and clear of extra chores. In the past, checking the performance of these standby databases was difficult and required a lot of manual setup. With the new Oracle AI Database 26ai , that has changed. Performance tracking is now automatic and easy. The Old Way vs. The New Way Previously, setting up performance tracking (called AWR) on a standby database was a headache. The Old Challenges - Problems with the Old Method (UMF) Before the new 26ai update, database administrators had to use a system called Unified Management Framework (UMF) . It was difficult to use for several reasons: Too Much Manual Work: Admins had to manually link every single primary database to its standby database. If you had many databases, this took a long time and was easy to mess up. Constant Monitoring Needed: If the sy...

Starting with Oracle AI Database 26ai, Release Update 23.9 , Oracle introduced a new initialization parameter called ALERT_LOG_MAX_SIZE . This parameter gives DBAs more control over the size and management of the alert log - one of the most important diagnostic files in an Oracle environment. In this post, we’ll break down what the parameter does, how it behaves, and what you need to know before setting it in your database. What Is ALERT_LOG_MAX_SIZE? ALERT_LOG_MAX_SIZE specifies the maximum size of the XML alert log , expressed in bytes. It helps prevent the alert log from growing indefinitely and consuming unnecessary disk space. Property Description Parameter Type Big integer Syntax ALERT_LOG_MAX_SIZE = integer [K,M,G] Default Value 1000M Modifiable Yes (via ALTER SYSTEM) Modifiable in PDB No Range 0, and 50 MB up to OS-depe...

Effective transaction management is central to running a high‑performance, highly available Oracle Database environment. With Oracle Database 26AI, the database engine introduces enhanced capabilities that improve how blocked transactions are handled, how row‑level locks are controlled, and how long‑running or stalled sessions are recovered. This post provides a clear, DBA‑friendly overview of these features and how to use them in real environments. What Is a Transaction in Oracle? A transaction represents a logical, atomic unit of work that includes one or more SQL statements executed as a group. Oracle ensures that the entire group is either fully committed or fully rolled back , maintaining the classic ACID guarantees. This means your database always transitions from one consistent state to another. Transactions implicitly begin with the first executable SQL statement and end either when you issue a COMMIT, a ROLLBACK, or an implicit commit occurs (for example, during DDL op...

Oracle Database has long been the fortress of enterprise data, but with the release of Oracle 26ai , that fortress just got a lot smarter. One of the most critical security enhancements in recent years is the SQL Firewall , and the latest update introduces a surgical way to manage with the dbms_sql_firewall.append_allow_list_single_sql procedure. What is Oracle SQL Firewall? Before diving into the new features, let’s recap how the SQL Firewall works. Think of it as a "VIP list" for your database. It provides real-time protection against SQL injection and unauthorized access by restricting users to a specific set of: Authorized SQL statements Approved connection paths (IP addresses, programs, etc.) For the firewall to be effective, it first needs to be trained . You enable a "capture" period where the database learns the normal behavior of a user. Once you're confident you've captured all legitimate traffic, you generate an allow-list ...

  The evolution from Oracle 19c to the latest 23ai and 26ai releases isn’t just about new AI features; it’s a fundamental shift in how the database is structured and managed. For DBAs, this means unlearning some old habits and embracing a more automated, secure, and streamlined architecture. Here is a breakdown of the most impactful structural changes you’ll encounter. Data Dictionary & Ownership: Strengthening the Core Oracle is tightening the reins on internal object management to boost security and performance. LogMiner Move: In a move toward better kernel control, LogMiner objects have migrated from the SYSTEM schema to SYS. This reduces the risk of accidental modification and aligns with "least privilege" principles. Component Cleanup: During the upgrade process, Oracle now standardizes Spatial components under the MDSYS schema. Notably, older, legacy multimedia components are being stripped out to reduce the database footprint. JSON Duality: For those...

  In an era where data is the new oil, your database is the high-security vault. But how often do you check the locks? For Oracle Database users, the Database Security Assessment Tool (DBSAT) is the essential "home inspection" kit for your data environment. Whether you're preparing for a GDPR audit or just trying to sleep better at night, DBSAT provides a fast, comprehensive way to evaluate your security posture. What is DBSAT? Oracle DBSAT is a lightweight, command-line utility that identifies security risks by analyzing database configurations, user entitlements, and sensitive data locations. It doesn’t just point out problems; it provides actionable recommendations based on CIS Benchmarks , DISA STIG , and Oracle best practices. The Three Pillars of DBSAT The tool operates through three distinct components: The Collector: Runs SQL queries and OS commands on the database server to gather raw metadata. The Reporter: Analyzes the collecte...