docs/CHANGELOG.md: cut v1.55.0

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Aliaksandr Valialkin 2021-03-02 21:31:54 +02:00
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# tip
# [v1.55.0](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.55.0)
* FEATURE: add `sign(q)` and `clamp(q, min, max)` functions, which are planned to be added in [the upcoming Prometheus release](https://twitter.com/roidelapluie/status/1363428376162295811) . The `last_over_time(m[d])` function is already supported in [MetricsQL](https://victoriametrics.github.io/MetricsQL.html).
* FEATURE: vmagent: add `scrape_align_interval` config option, which can be used for aligning scrapes to the beginning of the configured interval. See [these docs](https://victoriametrics.github.io/vmagent.html#troubleshooting) for details.
* FEATURE: expose io-related metrics at `/metrics` page for every VictoriaMetrics component: