The v_repage_proc parameter

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The v_repage_proc parameter determines whether a process is eligible for suspension and is used to set a threshold for the ratio of two measures that are maintained for every process: the number of repages (r) and the number of page faults that the process has accumulated in the last second (f).

A high ratio of repages to page faults means the individual process is thrashing. A process is considered eligible for suspension (it is thrashing or contributing to overall thrashing) when the following is true:

r/f > 1/v_repage_proc or r*v_repage_proc > f

The default value of v_repage_proc is 4, meaning that a process is considered to be thrashing (and a candidate for suspension) when the fraction of repages to page faults over the last second is greater than 25 percent. A low value of v_repage_proc results in a higher degree of individual process thrashing being allowed before a process is eligible for suspension.

To disable processes from being suspended by the memory load control, do the following:

# schedo -o v_repage_proc=0

Note that fixed-priority processes and kernel processes are exempt from being suspended.