Sequences are a fundamental feature in Oracle databases, commonly used for generating unique identifiers such as primary keys. However, in a Real Application Clusters (RAC) environment, sequence behavior introduces certain performance and ordering challenges that require careful configuration. This blog provides insights into sequence configurations, gaps, and their performance impact in a RAC setup. 1. […]
A Far Sync instance in Oracle Data Guard acts as a SYNC redo transport destination that facilitates zero data loss across long distances. By strategically placing the Far Sync instance at a metro distance from the primary database, it handles communication with a remote standby database located farther away. This setup ensures zero data loss […]
An SQL Profile in Oracle is a set of optimizer directives created to improve the execution plan for a specific SQL statement. It contains statistical information or corrections to cardinality and cost estimates, allowing the optimizer to generate a more efficient plan without changing the SQL code itself. SQL Profiles are typically generated by the […]
The following are some of the key enhancements to the Oracle Database memory architecture in 19c over 12c: In addition to these specific enhancements, Oracle Database 19c also includes a number of general improvements to the memory management architecture. For example, the database now uses a more efficient memory allocation algorithm and improved memory reclamation […]