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  1. Lucene - Core
  2. LUCENE-4291

consider reducing jflex buffer sizes

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Details

    • Task
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 4.0-BETA, 6.0
    • modules/analysis
    • None
    • New

    Description

      Spinoff from SOLR-3684.

      Most lucene tokenizers have some buffer size, e.g. in CharTokenizer/ICUTokenizer its char[4096].

      But the jflex tokenizers use char[16384] by default, which seems overkill. I'm not sure we really see any performance bonus by having such a huge buffer size as a default.

      There is a jflex parameter to set this: I think we should consider reducing it.

      In a configuration like solr, tokenizers are reused per-thread-per-field,
      so these can easily stack up in RAM.

      Additionally CharFilters are not reused so the configuration in e.g.
      HtmlStripCharFilter might not be great since its per-document garbage.

      Attachments

        1. LUCENE-4291.patch
          41 kB
          Robert Muir

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            Unassigned Unassigned
            rcmuir Robert Muir
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              Created:
              Updated:
              Resolved: