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Editorial Team
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Asked: 2026-05-14T07:06:50+00:00

I am trying to design a tagging system with a model like this: Tag:

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I am trying to design a tagging system with a model like this:

Tag:
   content = CharField
   creator = ForeignKey
   used = IntergerField

It is a many-to-many relationship between tags and what’s been tagged.

Everytime I insert a record into the assotication table,
Tag.used is incremented by one, and decremented by one in case of deletion.

Tag.used is maintained because I want to speed up answering the question ‘How many times this tag is used?’.

However, this seems to slow insertion down obviously.

Please tell me how to improve this design.

Thanks in advance.

http://www.pui.ch/phred/archives/2005/06/tagsystems-performance-tests.html

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1 Answer

  1. Editorial Team

    If your database support materialized indexed views then you might want to create one for this. You can get a large performance boost for frequently run queries that aggregate data, which I think you have here.

    your view would be on a query like:

    SELECT
    TagID,COUNT(*)
    FROM YourTable
    GROUP BY TagID

    The aggregations can be precomputed and stored in the index to minimize expensive computations during query execution.

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