×

LOAD ESTIMATING SYSTEM AND COMPUTER LOAD ESTIMATING METHOD

  • US 20080222090A1
  • Filed: 03/05/2008
  • Published: 09/11/2008
  • Est. Priority Date: 03/08/2007
  • Status: Active Grant
First Claim
Patent Images

1. A load estimating system which estimates a load of a database, comprising:

  • a storage unit configured to include structure information defining a structure of a table in said database, first distribution information indicating probability distribution of condition variables of a query for said table, and second distribution information indicating probability distribution of values in said table;

    a record number calculating module configured to calculate the average number of selected records which meet conditions defined by condition variables, based on said structure information, said first distribution information and said second distribution information; and

    an access number calculating module configured to calculate the number of block accesses for said query based on the average number of selected records.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×