Fix a typo

Fix a typo
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Zhang Yong 2018-11-22 15:17:31 +08:00 committed by GitHub
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@ -74,7 +74,7 @@ avg() OF query(A, 15m, now) IS BELOW 14
```
- `avg()` Controls how the values for **each** series should be reduced to a value that can be compared against the threshold. Click on the function to change it to another aggregation function.
- `query(A, 15m, now)` The letter defines what query to execute from the **Metrics** tab. The second two parameters define the time range, `15m, now` means 5 minutes ago to now. You can also do `10m, now-2m` to define a time range that will be 10 minutes ago to 2 minutes ago. This is useful if you want to ignore the last 2 minutes of data.
- `query(A, 15m, now)` The letter defines what query to execute from the **Metrics** tab. The second two parameters define the time range, `15m, now` means 15 minutes ago to now. You can also do `10m, now-2m` to define a time range that will be 10 minutes ago to 2 minutes ago. This is useful if you want to ignore the last 2 minutes of data.
- `IS BELOW 14` Defines the type of threshold and the threshold value. You can click on `IS BELOW` to change the type of threshold.
The query used in an alert rule cannot contain any template variables. Currently we only support `AND` and `OR` operators between conditions and they are executed serially.