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    4. How to Increase OPAC and GUI Results Displayed and Sorted

    How to Increase OPAC and GUI Results Displayed and Sorted

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    1. Additional Information
    • Article Type: General
    • Product: Aleph
    • Product Version: 21, 22, 23

    Desired Outcome Goal:
    Increase the result-set and sort limits to increase the number of results displayed

    Procedure:
    The set_result_set_limit and www_sort_limit are described under www_server.conf and under pc_server_defaults in the Aleph Configuration Guide.

    1. setenv set_result_set_limit nnnn" controls how many results are displayed in the Brief List. (minimum value =1000; maximum = 20000; default = 1000)
    * If "1000" is specified, either explicitly or by default, even though 9,462 records are retrieved, the Brief List will include only 1,000
    * Set this to the highest number that, realistically, a patron would want to look through (remembering, of course, that patrons have the option of refining the search and retrieving a more precise result set).

    2. setenv www_sort_limit nnnn" is used to limit the sorting of the result set for performance reasons. The sort limit is a number of up to 6 digits; its default value is 999999 (i.e., no sort limit). This is NOT the best value. It is best to specify a www_sort_limit.

    Additional Information

    * Testing shows that almost all the time required for large result sets is spent in sorting the results.
    * With a higher set_result_set_limit (say 15,000), a www_sort_limit of, say, 5.000, and when there were 8,000 hits, the system would display them all, but they would not be sorted.
    Normally, they would be in descending record-number order. See KCS article 8192-5416 (Order of result sets exceeding display (or sort) limit).
    * In the example of 8,000 hits described above, customers may prefer to display only 5,000 records but have them sorted (and sortable). In this case, specify set_result_set_limit 5000 and omit www_sort_limit.
    * When it is preferred to make the larger result set available, even if it is not sorted (or sortable), specify set_result_set_limit 15000 and www_sort_limit 5000.

    Category: Web OPAC (500)

    Subject: Search (500)


    • Article last edited: 10/8/2013
    View article in the Exlibris Knowledge Center
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