Add option: Choose a vertical scale from the sequence: (1, 2, 5) × 10ⁿ. With the automatic adjust of the scale limit, it will be set to the values: 1, 2, 5, 10, 20, 50, 100 ... The limit of the scale, for example: 47 or 55 looks odd and uncomfortable.
ksysguard is no longer maintained, in Plasma 6 there is the Plasma system monitor for this task. If your wish is still valid for the Plasma 6 replacement, please re-open and we can move this bug to the new product, thanks!