When using labeled metrics, you can display a graph using the PromQL query language. The following PromQL features are supported in Mackerel.
Time series selector
- Vector selector
=(equality label matcher)!=(inequality label matcher)=~(regular expression label matcher)!~(negative regular expression label matcher)
- Range vector selector
Modifiers
Aggregation operators
Also, the by and without modifiers for controlling the labels used for aggregation are supported.
Binary operators
Defined in 4 patterns: (vector) x (vector), (vector) x (scalar), (scalar) x (vector), and (scalar) x (scalar).
To perform vector operations, a mechanism called vector matching is implemented. One-to-one correspondence (arithmetic and comparison operators) and many-to-many correspondence (set operators) have already been implemented.
One-to-many correspondence using the group_left and group_right modifiers is not implemented.
