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Copy file name to clipboardExpand all lines: _ml-commons-plugin/api/stats.md
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# Stats
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The Stats API provides basic statistics about ML Commons, such as the number of running tasks. To monitor machine learning workflows using more detailed time-series metrics, see [Monitoring machine learning workflows]({{site.url}}{{site.baseurl}}/monitoring-your-cluster/metrics/getting-started/#monitoring-machine-learning-workflows).
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2. **UpDown counters:** UpDown counters can be incremented with positive values or decremented with negative values. UpDown counters are well suited for tracking metrics like open connections, active requests, and other fluctuating quantities.
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3. **Histograms:** Histograms are valuable tools for visualizing the distribution of continuous data. Histograms offer insight into the central tendency, spread, skewness, and potential outliers that might exist in your metrics. Patterns such as normal distribution, skewed distribution, or bimodal distribution can be readily identified, making histograms ideal for analyzing latency metrics and assessing percentiles.
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4. **Asynchronous Gauges:** Asynchronous gauges capture the current value at the moment a metric is read. These metrics are non-additive and are commonly used to measure CPU utilization on a per-minute basis, memory utilization, and other real-time values.
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## Monitoring machine learning workflows
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Introduced 3.1
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{: .label .label-purple }
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OpenSearch provides enhanced observability for [machine learning (ML)]({{site.url}}{{site.baseurl}}/ml-commons-plugin/) workflows. Metrics related to ML operations are pushed directly to the core metrics registry, giving you improved visibility into model usage and performance. Additionally, every 5 minutes, a periodic job collects and exports state data, helping you monitor the health and activity of your ML workloads over time.
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To enable ML observability, specify the following settings in `opensearch.yml`:
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