Storage system having means for acquiring execution information of a database management system

摘要

A storage system (10) for providing a preferable data access performance by performing controls considering database management system (DBMS) execution information (38) or database process priorities, by acquiring static configurational information of a DBMS (110a, 110b) by means of a DBMS information acquisition and communication program (118), a DBMS information communication section (116), and a host information setting program (130); acquiring DBMS execution information (38) by means of a query plan acquisition program (120), the DBMS information communication section (116), and a process performance management program (132); acquiring information on priorities of database processes given by the process performance management program (132); and storing them in disk I/O management information with process priorities (36, 36b), DBMS execution information (38), and DBMS data information (40), in which cache control section (54) in a storage system control program (50) controls a data cache (28) by referring the above information.