Controls whether memory is examined for modified pages during fsflush invocations. In each invocation of fsflush, the number of memory pages in the system is determined (it might have changed because of a dynamic reconfiguration operation). Each invocation scans (total number of pages x tune_t_fsflushr) / autoup pages.
0 (disabled) or 1 (enabled)
If the system page scanner rarely runs, indicated by a value of 0 in the sr column of vmstat output.