Device management system in a computer system

Claim 3

A device management system in a computer system as claimed in claim 1, wherein the device (10) to be managed has a plurality of mechanisms to be managed, and the managing unit (13) comprises management period distributing means (41, 51, and 23) for distributing, within said management period determined by said management period determining unit (14), the availability of the processings of said plurality of mechanisms.

Claim 4

A device management system in a computer system as claimed in claim 2, wherein the managing unit (13) further comprises management period changing means (41, 43) for sequentially changing said management period determined by said management period determining unit (14) so as to provide provisional management periods, said provisional management period changing from the management period in the last management cycle to the management period in the current management cycle step by step.

Claim 5

A device management system in a computer system as claimed in claim 1, 2, or 3, wherein said device (10) to be managed is a real memory (20) for storing a plurality of real pages.

Claim 6

A device management system in a computer system as claimed in claim 4, wherein said device management system is a memory management system for updating an unreferenced interval count (UIC) of each real page in a real memory, said management period determining unit (14) comprising: a determining means (29) for determining a UIC update period in response to a system reference UIC which is equal to the maximum value of the space reference UICs, each of said space reference UICs being derived from the maximum UIC among the UICs of real pages allocated to a virtual space and a real storage priority given to the virtual space, said reference UIC update period being determined in such a way that the larger the system reference UIC is, the longer the specified UIC update period; and the shorter the system reference UIC is, the shorter the specified UIC update period; a judging means (30), operatively connected to said determining means (29), for judging whether or not the UIC of each real page allocated to a virtual space reaches the UIC update period; and an updating means (31), operatively connected to said judging means (30), for updating the UIC of the real page allocated to the virtual space by adding said update period to said UIC when the UIC of a real page allocated to a virtual space reaches the UIC update period and when the real page has not been accessed since the last update period, and for resetting the UIC of the real page allocated to the virtual space to zero when the UIC of the a real page allocated to a virtual space reaches the UIC update period but when the real page has been accessed since the last update period.

Claim 7

A device management system in a computer system as claimed in claim 5, further comprising interval counter managing units (28) for storing the UICs of the real pages allocated to the virtual spaces.

Claim 8

A device management system in a computer system as claimed in claim 5 or 6, wherein said space reference UIC of each virtual space is obtained by dividing the space maximum UIC of the virtual space by the real storage priority given to the virtual space.

Claim 9

A device management system in a computer system as claimed in claim 7, wherein said UIC update period is determined by multiplying said system reference UIC by a requested accuracy of said system reference UIC.

Claim 10

A device management system in a computer system as claimed in claim 5, 6, 7 or 8, characterized in that: the updating means (31) comprises update period dispersing means (41, 51, and 23) for distributing, within said update period determined by said determining means (29), the availability of the update processings.

Claim 11

A device management system in a computer system as claimed in claim 9, wherein the updating means (31) further comprises update period changing means (41, 43) for sequentially changing said update period determined by said determining means (29) so as to provide a provisional update period, said provisional update period changing from the update period in the last update cycle to the update period in the current update cycle step by step.