Grafana visual configuration diagram histogram

Histogram histogram 

Histograms visualize the distribution of calculated values and display them as bar graphs .Y The height of the axis and each bar represents the count of values falling into each bracket , and X The axis represents the range of values .

Supported data formats Supported data formats

Histogram visualization supports time series and any tabular results with one or more numeric fields .

Display options Display options

Use the following options to optimize your visualization .

Barrel size Bucket size

The size of the barrel . Leave this blank to automatically resize the bucket （ about 10% The full range of ）.

Barrel offset Bucket offset

If the first bucket should not start from scratch . Non zero offset has the effect of moving the aggregation window . for example , The size is 0-5、5-10、10-15 And the default offset is 0 Of 5 The size bucket will become offset 2 Of 2-7、7-12、12-17; under these circumstances ,0、5 or 10 The offset of does not actually do anything . Usually , This option will be used with a clearly defined bucket size , Instead of using it automatically . To make this setting effective , The offset should be greater than 0 And smaller than the barrel size ; Values outside this range will have the same effect as values within this range .

Combination series Combine series

This will merge all series and fields into a combined histogram .

Line width Line width

Control the line width of the bar .

Fill opacity Fill opacity

Control the fill opacity bar .

Gradient mode Gradient mode

Set the mode of gradient fill . The fill gradient is based on the line color . To change the color , Please use standard ​ ​ The color scheme ​​ Field options .

The gradient display is affected by Fill opacity The impact of setting .

There is no None

No gradient fill . This is the default setting .

The opacity Opacity

The transparency of the gradient is based on Y The value on the axis is calculated . The opacity of the fill increases with Y Increase the value on the axis .

tonal Hue

Gradient color is generated according to the hue of line color .

Tooltip mode Tooltip mode

When you hover the cursor over the visualization ,Grafana You can display tooltips . Choose how tooltips behave .

• A single Single - Hover tooltips display only one series , That is, the series you hover over the visualization .
• All All - Hover tooltips show all series in the visualization .Grafana Highlight the series you hover over in bold in the series list of tooltips .
• hide Hidden - Do not display tooltips when interacting with visualization .

Be careful ： Use overrides to hide individual series from tooltips .

Legend mode Legend mode

Use these settings to optimize how the legend is displayed in the visualization .

• list List - Display the legend as a list . This is the default display mode of the legend .
• form table - Display the legend as a table .
• hide hidden - Hide the legend .

Legend placement Legend placement

Choose where to display the legend .

• Bottom Bottom  - Below the chart .
• Right Right  - On the right side of the chart .

Legend calculation

Select the ​ ​ Standard calculation .​​ You can choose more than one .

as follows ：

Calculation type Calculation types

Calculation	Description
All nulls	True when all values are empty
All zeros	When all values are 0 Time is true
Change count	Number of field value changes
Count	The number of values in the field
Delta	Cumulative change in value, only counts increments; Cumulative changes in value , Just calculate the increments
Difference	Difference between first and last value of a field; The difference between the first value and the last value of the field
Difference percent	Percentage change between first and last value of a field Percentage change between the first value and the last value of the field
Distinct count	Number of unique values in a field The number of unique values in the field
First (not null)	First, not null value in a field first , Non null value in field
Max	Maximum value of a field The maximum value of the field
Mean	Mean value of all values in a field The average of all values in the field
Min	Minimum value of a field The minimum value of the field
Min (above zero)	Minimum, positive value of a field The minimum value of the field , Comes at a time
Range	Difference between maximum and minimum values of a field The difference between the maximum and minimum values of the field
Step	Minimal interval between values of a field Minimum interval between field values
Total	Sum of all values in a field The sum of all values in the field