Patent ID: 7647450

Claim:
A method of monitoring performance in a computer system having: at least one host computer; one or more storage subsystems connected to said host computer; and a management computer connected to said storage subsystems, wherein each of said storage subsystems has physical disks for storing data and a disk controller for controlling input/output of the data to/from said physical disks, the method comprising: providing storage areas of said physical disks as logical volumes to said host computer; defining a plurality of performance data collecting frequency level groups, each group defined by a set of performance data collection items to be collected at fixed collection intervals defined for said group; selecting a correspondence between said logical volumes and said performance data collecting frequency level groups, such that each of said logical volumes corresponds to only one of said performance data collecting frequency level groups; monitoring performance information of said logical volumes each corresponding to each performance data collecting frequency level group at each of said collection intervals; and changing the collection interval if the correspondence between one of said logical volumes and said group is changed, and if the amount of performance data exceeds a threshold.