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The open and composable observability and data visualization platform. Visualize metrics, logs, and traces from multiple sources like Prometheus, Loki, Elasticsearch, InfluxDB, Postgres and many more.
alertinganalyticsbusiness-intelligencedashboarddata-visualizationelasticsearchgografanahacktoberfestinfluxdbmetricsmonitoringmysqlpostgresprometheus
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* Alerting: Optimize rule status gathering APIs when a limit is applied. The frontend very commonly calls the `/rules` API with `limit_alerts=16`. When there are a very large number of alert instances present, this API is quite slow to respond, and profiling suggests that a big part of the problem is sorting the alerts by importance, in order to select the first 16. This changes the application of the limit to use a more efficient heap-based top-k algorithm. This maintains a slice of only the highest ranked items whilst iterating the full set of alert instances, which substantially reduces the number of comparisons needed. This is particularly effective, as the `AlertsByImportance` comparison is quite complex. I've included a benchmark to compare the new TopK function to the existing Sort/limit strategy. It shows that for small limits, the new approach is much faster, especially at high numbers of alerts, e.g. 100K alerts / limit 16: 1.91s vs 0.02s (-99%) For situations where there is no effective limit, sorting is marginally faster, therefore in the API implementation, if there is either a) no limit or b) no effective limit, then we just sort the alerts as before. There is also a space overhead using a heap which would matter for large limits. * Remove commented test cases * Make linter happy |
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The open-source platform for monitoring and observability
Grafana allows you to query, visualize, alert on and understand your metrics no matter where they are stored. Create, explore, and share dashboards with your team and foster a data-driven culture:
- Visualizations: Fast and flexible client side graphs with a multitude of options. Panel plugins offer many different ways to visualize metrics and logs.
- Dynamic Dashboards: Create dynamic & reusable dashboards with template variables that appear as dropdowns at the top of the dashboard.
- Explore Metrics: Explore your data through ad-hoc queries and dynamic drilldown. Split view and compare different time ranges, queries and data sources side by side.
- Explore Logs: Experience the magic of switching from metrics to logs with preserved label filters. Quickly search through all your logs or streaming them live.
- Alerting: Visually define alert rules for your most important metrics. Grafana will continuously evaluate and send notifications to systems like Slack, PagerDuty, VictorOps, OpsGenie.
- Mixed Data Sources: Mix different data sources in the same graph! You can specify a data source on a per-query basis. This works for even custom datasources.
Get started
Unsure if Grafana is for you? Watch Grafana in action on play.grafana.org!
Documentation
The Grafana documentation is available at grafana.com/docs.
Contributing
If you're interested in contributing to the Grafana project:
- Start by reading the Contributing guide.
- Learn how to set up your local environment, in our Developer guide.
- Explore our beginner-friendly issues.
- Look through our style guide and Storybook.
Get involved
- Follow @grafana on Twitter.
- Read and subscribe to the Grafana blog.
- If you have a specific question, check out our discussion forums.
- For general discussions, join us on the official Slack team.
This project is tested with BrowserStack
License
Grafana is distributed under AGPL-3.0-only. For Apache-2.0 exceptions, see LICENSING.md.