SIOSLICE parameter

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Server slice - IO


Default value
Parameter type
Where set
On User 0's parameter line or reset by system manager
Related products
Model 204 V2.1 or earlier


The server real-time slice allotment in milliseconds for non-CPU-bound users

This parameter controls the time a non-CPU-bound user is allowed to remain in a server area without performing any terminal I/O. It is used primarily when a lower priority user in a server is denied CPU time because of higher priority, CPU-bound users. The latter type might be waiting for a server and might be of sufficient priority to be run in a server.

Decreasing SIOSLICE might generate increased server I/O, but it offers better service to higher priority users when there are few servers or when Model 204 is being run on a heavily overloaded system. Increasing this parameter can lower server I/O, but at the same time it diminishes the response differential between low and high priority users. SIOSLICE must not be set to less than twice the value of IOSLICE.