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:
Mar. 10, 2009
Filed:
Mar. 31, 2006
Matthew James Carroll, Toronto, CA;
Christian Marcelo Garcia-arellano, Richmond Hill, CA;
Sam Sampson Lightstone, Toronto, CA;
Michael Joshua Snowbell, Thornhill, CA;
Adam J. Storm, Thornhill, CA;
Matthew James Carroll, Toronto, CA;
Christian Marcelo Garcia-Arellano, Richmond Hill, CA;
Sam Sampson Lightstone, Toronto, CA;
Michael Joshua Snowbell, Thornhill, CA;
Adam J. Storm, Thornhill, CA;
International Business Machines Corporation, Armonk, NY (US);
Abstract
Providing cost model data for tuning query cache memory size in database systems. In one aspect, a query is received, and a query cache is checked for a stored query matching the received query. In response to a cache miss occurring, a token representing the received query is generated and checked for matching a token stored in a simulation area, each stored token representing a query object previously evicted from the query cache. A processing time saved by an avoidance of the cache miss is determined, and a cache size needed to avoid the cache miss is determined only when the generated token matches a stored token, by summing sizes of all query objects represented by the stored tokens. Each stored token is included in a stub that also includes the size of the represented query object and an identification number indicating a stored order.