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Application of the Page Survival Index (PSI) to Virtual-memory System Performance

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1 Author(s)
Bard, Y. ; IBM Data Processing Division Scientific Center, 545 Technology Square, Cambridge, Massachusetts 02139, USA

The Page Survival Index (PSI) was defined in a preceding paper where it was used to describe the behavior of individual programs running in a time sharing environment. Here we show how a system-wide value of PSI can be calculated on the fly by the operating system. This value can be used to estimate users’ memory requirements and to control system performance by maintaining the proper multiprogramming level. Simulation results show that a scheduler based on these concepts can achieve significant improvements in system performance.

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

Published in:

IBM Journal of Research and Development  (Volume:19 ,  Issue: 3 )

Date of Publication:

May 1975

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