Oracle DBA

The following are some of the key enhancements to the Oracle Database memory architecture in 19c over 12c:

• Improved Database Smart Flash Cache performance: Database Smart Flash Cache is a transparent extension of the database buffer cache that uses solid state drive (SSD) technology. In 19c, Database Smart Flash Cache has been enhanced to provide better performance for both read-intensive and write-intensive workloads. This is due to a number of factors, including improved caching algorithms and support for larger cache sizes.
• Improved Oracle Database In-Memory performance: Oracle Database In-Memory (DBIM) is a suite of features that greatly improves performance for real-time analytics and mixed workloads. In 19c, DBIM has been further improved to provide better performance for complex queries and workloads with a high percentage of analytical queries. This is due to a number of factors, including improved data compression and support for larger in-memory tables.
• Enhanced Memoptimized Rowstore performance: The Memoptimized Rowstore is a new data storage format that is optimized for high-performance data streaming applications. In 19c, the Memoptimized Rowstore has been enhanced to provide even better performance for streaming applications, such as Internet of Things (IoT) applications. This is due to a number of factors, including improved columnar compression and support for larger streaming tables.
• Improved memory management for large databases: Oracle Database 19c includes several new features that improve memory management for large databases. For example, the new “Force Full Database Caching Mode” feature allows you to cache the entire database in the buffer cache, which can improve performance for read-intensive workloads. Additionally, the database now does a better job of predicting memory usage and allocating memory to the appropriate components, which can lead to better performance and improved scalability.

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 techniques. This can lead to better performance and improved memory utilization.

Overall, the Oracle Database memory architecture in 19c is more efficient and scalable than ever before. The new enhancements provide significant performance benefits for a wide range of workloads, including read-intensive OLTP, ad-hoc queries, bulk data modifications, real-time analytics, and data streaming.

Here are some specific examples of how the enhanced memory architecture in Oracle Database 19c can benefit users:

• Improved Database Smart Flash Cache performance can lead to significant performance improvements for read-intensive OLTP workloads and ad-hoc queries.
• Improved Oracle Database In-Memory performance can lead to significant performance improvements for real-time analytics workloads and mixed workloads with a high percentage of analytical queries.
• Enhanced Memoptimized Rowstore performance can lead to significant performance improvements for data streaming applications, such as IoT applications.
• Improved memory management for large databases can help to improve performance and scalability for databases with terabytes or petabytes of data.

If you are using Oracle Database 12c and are looking for improved performance, I recommend that you consider upgrading to 19c. The enhanced memory architecture in 19c can provide significant performance benefits for a wide range of workloads.