> ## Documentation Index > Fetch the complete documentation index at: https://docs.startree.ai/llms.txt > Use this file to discover all available pages before exploring further. # Anomaly Merger Rules Consider an alert that runs with hourly granularity and an incident that last 3 hours. The alert will detect an anomaly 3 times, but it is actually the same incident. ThirdEye merges the anomalies in a single one. By default, the following rules are applied: 1. consecutive anomalies are merged 2. if an anomaly lasts for more than 7 days, a new anomaly is created ## Examples ### Anomaly merge 1. Default behavior merging anomalies 2. Custom behavior\ You can configure ThirdEye to merge anomalies that have a small gap between them using [mergeMaxGap](/thirdeye/templates/startree-threshold#anomaly-merger).\ For instance, with `mergeMaxGap=PT2H`, anomalies that have less than 2 hours between them are merged together. custom merging anomalies 3. Disable anomaly merger\ You can disable anomaly merger by setting `mergeMaxGap=PT0S`. anomaly merger disabled ### Anomaly max length A new anomaly is created when the maximum length is reached. You can customize this maximum length with [mergeMaxDuration](/thirdeye/templates/startree-threshold#anomaly-merger). merging maximum