Monitoring performance counters is critical for optimizing Oracle Database performance. Here are ten significant performance counters (also called as performance metrics or statistics) to consider while analyzing an Oracle 19c database’s performance: Buffer Cache Hit Ratio- Indicates the efficiency of the buffer cache by measuring the ratio of cache hits to total requests. Query- SELECT…

Read More

Oracle Database 19c refers to the 19th version of the Oracle Database, which is a relational database management system (RDBMS) developed and marketed by Oracle Corporation. The “c” in 19c stands for “Cloud,” indicating Oracle’s commitment to cloud computing and cloud-based solutions. Oracle 19c is the successor to Oracle Database 18c and comes with several…

Read More

In Oracle Database, the Resource Manager is a feature that allows you to manage and allocate resources among different users and applications. It enables you to control the number of resources (CPU, memory, and parallel execution servers) consumed by database sessions and helps in preventing runaway queries or resource-intensive operations from adversely impacting the overall…

Read More

In the field of database management, maintaining data integrity and controlling concurrent access is paramount. Oracle Database, a robust relational database management system, employs a sophisticated locking mechanism to achieve these objectives. In this comprehensive guide, we delve into the intricacies of the Oracle Database Locking Mechanism, exploring key terms and concepts integral to its functionality.…

Read More

A materialized view, or snapshot as they were previously known, is a table segment whose contents are periodically refreshed based on a query, either against a local or remote table. Basic Syntax-  The full syntax description for the CREATE MATERIALIZED VIEW command is available in the documentation. Here we will only concern ourselves with the basics.  –Normal …

Read More

An important part of an Oracle database is its data dictionary, which is a read-only set of tables that provides administrative metadata about the database. A data dictionary contains information such as the following: ·         The definitions of every schema object  in the database, including default values for columns and integrity constraint information ·         The amount of space allocated…

Read More

The Automatic Diagnostic Repository (ADR) is a system-wide tracing and logging central repository for database diagnostic data. It includes the following items:  Background trace files :  Background trace files store information from database background processes. When a process detects an internal error, the process dumps information about the error to its trace file. Some of the information written to a…

Read More

Database corruption Database corruption in Oracle can occur due to various reasons, such as hardware failures, software bugs, or issues during database operations. It’s crucial to identify and address corruption promptly to ensure data integrity. Here are some steps you can take to deal with database corruption in Oracle: Physical corruption: This happens generally due to…

Read More

In the context of Oracle databases, “cloning” typically refers to the process of creating an exact replica of a database, usually for purposes such as testing, development, or disaster recovery. There are several methods for cloning an Oracle database, each with its own advantages and use cases. Here’s an overview of some common cloning methods…

Read More