Kiu/VictoriaMetrics
Kiu/VictoriaMetrics
1
0
Fork 0
mirror of https://github.com/VictoriaMetrics/VictoriaMetrics.git synced 2025-01-20 07:19:17 +01:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

ExtendedPromQL.md: mention that the union function name may be omitted

Aliaksandr Valialkin 2019-03-16 16:57:50 +02:00
parent e608696a82
commit 2159eb5e89
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
ExtendedPromQL.md

@ -15,7 +15,8 @@ Try these extensions on [an editable Grafana dashboard](http://play-grafana.vict
- Comments starting with `#` and ending with newline. For instance, `up # this is a comment for 'up' metric`.
- Rollup functions - `rollup(m[d])`, `rollup_rate(m[d])`, `rollup_deriv(m[d])`, `rollup_increase(m[d])`, `rollup_delta(m[d])` - return `min`, `max` and `avg`
values for all the `m` data points over `d` duration.
- `union(q1, ... qN)` function for building multiple graphs for `q1`, ... `qN` subqueries with a single query.
- `union(q1, ... qN)` function for building multiple graphs for `q1`, ... `qN` subqueries with a single query. The `union` function name may be skipped -
the following queries are equivalent: `union(q1, q2)` and `(q1, q2)`.
- `ru(freeResources, maxResources)` function for returning resource utilization percentage in the range `0% - 100%`. For instance, `ru(node_memory_MemFree_bytes, node_memory_MemTotal_bytes)` returns memory utilization over [node_exporter](https://github.com/prometheus/node_exporter) metrics.
- `ttf(slowlyChangingFreeResources)` function for returning the time in seconds when the given `slowlyChangingFreeResources` expression reaches zero. For instance, `ttf(node_filesystem_avail_byte)` returns the time to storage space exhaustion. This function may be useful for capacity planning.
- Functions for label manipulation: