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Tuning the Facet Performance Parameter With the .NET Interface Editor

In most cases, the Coveo .NET Front-End default facet configuration efficiently produces a facet with a complete list of facet items. For facets which could contain a large number of items, the default configuration may produce facets that do not list all possible facet items. When this is not acceptable, consider tuning the facet performance parameter available in the .NET Interface Editor.

To tune the facet performance parameter with the .NET Interface Editor

  1. Access the Coveo .NET Front-End Interface Editor (see Opening the .NET Interface Editor).

  2. Select the Search Interfaces tab.

  3. On the menu bar:

    1. In the Current Interface drop-down list, select the search interface that you want to modify.

    2. Click the Features menu.

  4. In the navigation panel on the left, click Facets and Related Results.

  5. In the right panel, under Facets and Related Results, click the facet for which you want to tune the performance.

  6. Next to Performance:

    Choose one of the available options to set how many returned results are scanned for each query to find the possible facet items. Moving the option selection from the left (Less Precise) to the right (More Precise) increases the number of scanned results.

    • Selecting the left-most option under Faster (default value) should list all available facet items in a majority of cases since the facet display process scans up to the first 1000 returned results to identify the possible facet items.

    • Select a button towards More Precise when you suspect that there is a large number of facet items and you want to increase the chances that the facet displays all of them.

    • Selecting Most Precise ensures that the facet lists all items by scanning all query results. Be aware however that with this selection, the facet display may be very slow for queries returning a large number of results.

    Example: Let's say an Author facet appears in a search interface for a blog site with thousands of possible authors. When a query returns 80 results, the facet lists all the possible facet items. A second query returns, let's say 5000 results. In this case, because by default the facet only looks at the first 1000 returned results to identify possible authors, it is likely that the facet will not list all authors of the 5000 blog posts.

    Note: The term Precision for this parameter refers to the probability for the facet to list all possible facet items. However, the number of result occurrences appearing between parentheses for each facet item is always accurate.

  7. Click OK.

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