International Business Machines Corporation

Gregory M Dritschler

Peter Bergersen Yocom

Catherine Krueger Eilert

Jeffrey David Aman

John Elliott Arwe

David Andrew Booz

David Vincent Bostjancic

A method and apparatus for controlling the number of servers in an information handling system in which incoming work requests belonging to a first service class are placed in a queue for processing by one or more servers. The system also has units of work assigned to a second service class that acts as a donor of system resources. In accordance with the invention, a performance measure is defined for the first service class as well as for the second service class. Before adding servers to the first service class, there is determined not only the positive effect on the performance measure for the first service class, but also the negative effect on the performance measure for the second service class. Servers are added to the first service class only if the positive effect on the performance measure for the first service class outweighs the negative effect on the performance measure for the second service class.

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Poughkeepsie, NY, United States of America

Gregory M Dritschler