Create README.md

Folder for presentation on memory and caching technologies

data-platform/core-converged-db/db-performance/presentations/README.md

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+# Presentations
+Here you will find presentations about database performance topics e.g. an overview presentation about memory and caching technologies in Oracle Database.  
+
+For more information on additional advanced technologies, use [True Cache](https://github.com/oracle-devrel/technology-engineering/tree/main/data-platform/core-converged-db/true-cache) or [Oracle Database In-Memory](https://github.com/oracle-devrel/technology-engineering/tree/main/data-platform/core-converged-db/db-in-memory).
+
+Reviewed: 20.11.2024
+
+# When to use this asset?
+
+To present or to learn about Oracle Database performance technologies.
+
+# How to use this asset?
+
+Use PDF as a presentation.
+
+# License
+
+Copyright (c) 2024 Oracle and/or its affiliates.
+
+Licensed under the Universal Permissive License (UPL), Version 1.0.
+
+See [LICENSE](https://github.com/oracle-devrel/technology-engineering/blob/main/LICENSE) for more details.