Strange graph

[MichaelF]

Hello!
Would anybody tell me why ZABBIX displays correct free space values when viewed as Values and the strange graph when viewed as Graph (please see the screenshots)?

Q2: Is it normal to display the free space as 84GB when the real value is 79GB (I haven't supplied any letter (Gb, Kb,... in the Units field of the item)?

Thank you in advance,
Michael

[Atsushi]

If the value is very large but there is little change, it may be like the Y axis is attached. Maybe the numbers on the y-axis are as follows:

84.903
84.902
84.901
84.900
84.899
84.898

However, it is possible that the display is up to two digits after the decimal point, and the last number is not displayed.

For Q2, try setting the units. Whether to use 1000 or 1024 for KMG(Kilo, Mega, Giga) unit calculation differs depending on the unit. Since the value seems to be the number of bytes of free space on the disk, you should specify B as the unit.

[MichaelF]

Thank you for your repky, Atsushi!
Yes, that could theoretically be the cause of the issue - I'll try to use some multiplier (G, M) and see how it will look lile. However I think it's a bug.