Core in-memory space and object management architecture in a traditional RDBMS supporting DW and OLTP applications

摘要

Techniques are provided for managing in-memory space and objects. In one embodiment, a set of in-memory objects are maintained within an area in volatile memory that is accessible to a database server. An in-memory object in this context includes a set of one or more in-memory segments where each respective in-memory segment includes a set of in-memory extents and each respective in-memory extent is a contiguous chunk of memory from the area in volatile memory that is accessible to the database server. The area in volatile memory is managed as a set of stripes, where each stripe is a contiguous chunk of in-memory extents. Stripe control blocks are used to locate free in-memory extents for allocation and registration with an in-memory segment.

主权项

1. A method comprising:
maintaining, within an area in volatile memory that is accessible to a database server, a set of in-memory objects;
wherein each respective in-memory object within the set of in-memory objects includes a set of one or more in-memory segments;wherein each respective in-memory segment in the set of one or more in-memory segments includes a set of in-memory extents;wherein each respective in-memory extent in the set of in-memory extents is a contiguous chunk of memory from the area in volatile memory that is accessible to the database server; and maintaining, within the area in volatile memory that is accessible to the database server, a set of stripe lists;
wherein each respective stripe list in the set of stripe lists includes a set of stripes;wherein each respective stripe in the set of stripes includes a contiguous chunk of in-memory extents.