Why setting some value to vm.dirty_bytes resets vm.dirty_ratio to 0? - Red Hat Customer Portal

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Issue

Why setting some value to vm.dirty_bytes resets vm.dirty_ratio to 0? (or vice versa)
Why setting some value to vm.dirty_background_bytes resets vm.dirty_background_ratio to 0? (or vice versa)
Why setting vm.dirty_ratio and vm.dirty_bytes in sysctl.conf sets only one of the values? (same for respective background parameters)
Why setting vm.dirty_background_ratio to 0 after vm.dirty_background_bytes in sysctl.conf resets the value of vm.dirty_background_bytes to 0?

Environment

Red Hat Enterprise Linux 7 (and older)
sysctl setting for vm.dirty_bytes/ratio
sysctl setting for vm.dirty_background_bytes/ratio

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