ThirdEye dimensions recommender

The ThirdEye dimensions recommender uses an API call to recommend a list of dimensions which are metrics drivers.

Problem Context:

Working with a large dataset containing various metrics (measurements) and dimensions (categories that classify the data). Understanding what factors most influence your metrics can be challenging. For example, one might want to know which user demographics (country, device type) have the biggest impact on website pageviews.

Use Case:

The ThirdEye Dimensions Recommender is a tool that helps you identify the key dimensions driving a specific metric. This can be valuable for:

Optimizing marketing campaigns: See which demographics or channels contribute most to conversions.
Troubleshooting performance issues: Identify dimensions associated with unexpected dips or spikes in metrics.
Understanding user behavior: Discover which user segments have the most significant influence on key metrics.

Example:

Analyze website traffic. One wants to know which user characteristics (dimensions) most affect total pageviews (metric). Here's how to use the ThirdEye Dimensions Recommender:

Metric Selection: Specify the metric you want to analyze, for example, by providing its ID or name (e.g., "pageviews").
Filtering: Define a timeframe (start and end date) for the analysis. You can optionally set a threshold (minimum metric value) or a percentage contribution for the dimensions you're interested in.
Additional Criteria: You can add a "where" clause to filter data based on specific dimension values (e.g., only users from the US) or a "having" clause to filter based on the number of data points (e.g., only dimensions with over 1 million rows). Customization:
Max Depth: Set the maximum number of dimensions the recommender should consider when identifying contributing factors (e.g., country, device, browser version).
Limit: Specify the maximum number of top recommendations to return for each dimension combination.
Run the Analysis: The API will return a list of dimensions that significantly impact your chosen metric within the specified timeframe and criteria.

API reference

The recommender API is accessible at /api/rca/metrics/cohorts.

Here's an example:

POST https://thirdeye.yournamespace.domain.com/api/rca/metrics/cohorts
accept: application/json

This endpoint accepts a JSON payload and can be leveraged using the following parameters.

Parameters

Name	Description
start	The starting time in epoch milliseconds (millis). Example: 1623110400000 means Tue Jun 08 2021 00:00:00 UTC
end	The end time in epoch millis . Example: 1623283200000 means Thu Jun 10 2021 00:00:00 UTC
threshold	Exact value of metric. Dimensions Recommender which contribute more than this will be included.
percentage	If threshold is not provided, then percentage is used. Example: setting percentage to 10 means that threshold = 10% of overall aggregate.
generateEnumerationItems (beta)	If set to true, ThirdEye will also try to generate the list of enumeration items in addition to dimensions recommender
where	This is an additional where clause that can be added to the query in the form of a SQL expression. Example: `""where": "country LIKE 'US%' AND \"device\" = 'phone'""`
having	Similar to where, having clause is a SQL expression that can be added to the query. Example: `"COUNT(*) > 1000000"`
maxDepth	The max depth in dimensions that the recommendation engine will dive to. Example: maxDepth = 3 means all dimensions reported will have a max of 3 dimensions. like `country = 'US', device = 'phone', version='0.3.0'`. Default value is 10
dimensions	If set, this is the list of dimensions that the dimensions recommender will iterate through. Example: if the dataset has 5 dimensions and `"dimensions": ["country", "device"]`. ThirdEye will only iterate on these 2 dimensions
limit	If set, this behaves like top N. The number of results are trimmed to limit and the results are sorted in descending order by contribution. The default value is 100

Metric

A metric can be mentioned in multiple ways in the API.

Using ID

{
  "metric": {
    "id": 12746
  }
}

Using name

{
  "metric": {
    "name": "pageviews"
  }
}

Specifying the column name, aggregation function and table name

{
  "metric": {
    "aggregationColumn": "views",
    "aggregationFunction": "SUM",
    "dataset": {
      "name": "pageviews"
    }
  }
}

Payload examples

Return recommended dimensions with more than 10% contribution to the overall metric having more than n rows in a given timeframe.

{
  "metric": {
    "aggregationColumn": "views",
    "aggregationFunction": "SUM",
    "dataset": {
      "name": "pageviews"
    }
  },
  "percentage": 10,
  "having": "COUNT(*) > 1000000",
  "start": "1623110400000",
  "end": "1623283200000"
}

Return recommended dimensions that are above 40k page views showing only the top 5 for every dimension combination.

{
  "metric": {
    "id": 12746
  },
  "threshold": 400000,
  "maxDepth": 3,
  "limit": 5,
  "start": "1623110400000",
  "end": "1623283200000"
}

Scaling Workers ThirdEye RCA aggregation functions