The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 2008
Filed:
Jul. 06, 2004
Vadiraja Bhatt, Pleasanton, CA (US);
Praveen Vegulla, San Jose, CA (US);
Prasanta Ghosh, San Ramon, CA (US);
Girish Vaitheeswaran, Fremont, CA (US);
Vadiraja Bhatt, Pleasanton, CA (US);
Praveen Vegulla, San Jose, CA (US);
Prasanta Ghosh, San Ramon, CA (US);
Girish Vaitheeswaran, Fremont, CA (US);
Sybase, Inc., Dublin, CA (US);
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.