Database system providing methodology for extended memory support
US7421562B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2004 |
| Grant date | Sep 2, 2008 |
| Priority date | — |
| Expiry date | Aug 11, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/465
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A database system providing methodology for extended memory support is described. In one embodiment, for example, a method is described for extended memory support in a database system having a primary cache, the method comprises steps of: creating a secondary cache in memory available to the database system; mapping a virtual address range to at least a portion of the secondary cache; when the primary cache is full, replacing pages from the primary cache using the secondary cache; in response to a request for a particular page, searching for the particular page in the secondary cache if the particular page is not found in the primary cache; if the particular page is found in the secondary cache, determining a virtual address in the secondary cache where the particular page resides based on the mapping; and swapping the particular page found in the secondary cache with a page in the primary cache, so as to replace a page in the primary cache with the particular page from the secondary cache.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.