[Koha-bugs] [Bug 19502] New: Elasticsearch - result sets limited to 10000

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=19502

            Bug ID: 19502
           Summary: Elasticsearch - result sets limited to 10000
 Change sponsored?: ---
           Product: Koha
           Version: master
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P5 - low
         Component: Searching - Elasticsearch
          Assignee: koha-bugs at lists.koha-community.org
          Reporter: nick at bywatersolutions.com

With the new feature to jump to a last page of search results it is apparent
that we can't do this with our current use of ES. The standard limit is 10000
results, it can be increased at the cost of memory - need to look into 'Scroll'
or 'Search after' options

https://www.elastic.co/guide/en/elasticsearch/reference/5.5/index-modules.html
 index.max_result_window
    The maximum value of from + size for searches to this index. Defaults to
10000. Search requests take heap memory and time proportional to from + size
and this limits that memory. See Scroll or Search After for a more efficient
alternative to raising this. 

https://www.elastic.co/guide/en/elasticsearch/reference/5.6/search-request-scroll.html

https://www.elastic.co/guide/en/elasticsearch/reference/5.6/search-request-search-after.html

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