System for allocating resource using the weight that...

Details System for allocating resource using the weight that... System for allocating resource using the weight that...

2006-03-28

2006-03-28

An, Meng-Al T. (Department: 2195)

Electrical computers and digital processing systems: virtual mac

Task management or control

Process scheduling

C718S100000, C718S102000, C718S103000

Reexamination Certificate

active

07020878

ABSTRACT:
One embodiment of the present invention provides a resource scheduler for allocating a computer system resource, such as memory or mass storage, within a processor, to database management system (DBMS) processes. The resource scheduler operates according to resource plans and resource allocation methods. One or more plans may be configured and loaded with the DBMS. Each plan allocates the resource according to an associated resource allocation method. During operation of the DBMS, any or all of the active plans and resource allocation methods may be exchanged for alternate plans or resource allocation methods. In one embodiment of the invention the resource scheduler enforces a maximum active sessions resource allocation method in which system resources are allocated by limiting the number of active sessions allowed in groups of database processes grouped according to common execution requirements. A selected plan includes multiple process groups and/or sub-plans. The resource scheduler allocates system resources among the sub-plans and groups of database processes according to their associated limits on active session numbers, with sub-plans and groups having higher active session limits getting access to more system resources than sub-plans and groups having lower active session limits.

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