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This commit adds `@ <timestamp>` modifier as per this design doc: https://docs.google.com/document/d/1uSbD3T2beM-iX4-Hp7V074bzBRiRNlqUdcWP6JTDQSs/edit. An example query: ``` rate(process_cpu_seconds_total[1m]) and topk(7, rate(process_cpu_seconds_total[1h] @ 1234)) ``` which ranks based on last 1h rate and w.r.t. unix timestamp 1234 but actually plots the 1m rate. Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>
20 lines
757 B
Markdown
20 lines
757 B
Markdown
---
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title: Disabled Features
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sort_rank: 10
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---
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# Disabled Features
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Here is a list of features that are disabled by default since they are breaking changes or are considered experimental.
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Their behaviour can change in future releases which will be communicated via the [release changelog](https://github.com/prometheus/prometheus/blob/master/CHANGELOG.md).
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You can enable them using the `--enable-feature` flag with a comma separated list of features.
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They may be enabled by default in future versions.
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## `@` Modifier in PromQL
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`--enable-feature=promql-at-modifier`
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This feature lets you specify the evaluation time for instant vector selectors,
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range vector selectors, and subqueries. More details can be found [here](querying/basics.md#@-modifier).
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