Add "Seeding an empty database" section
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@ -410,6 +410,21 @@ there's nothing stopping somebody from doing this elsewhere in the code:
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SOME_CONSTANT = 'bar'
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```
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## How to seed a database with millions of rows
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You might want millions of project rows in your local database, for example,
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in order to compare relative query performance, or to reproduce a bug. You could
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do this by hand with SQL commands, but since you have ActiveRecord models, you
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might find using these gems more convenient:
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- [BulkInsert gem](https://github.com/jamis/bulk_insert)
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- [ActiveRecord::PgGenerateSeries gem](https://github.com/ryu39/active_record-pg_generate_series)
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### Examples
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You may find some useful examples in this snippet:
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https://gitlab.com/gitlab-org/gitlab-ce/snippets/33946
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[#15607]: https://gitlab.com/gitlab-org/gitlab-ce/issues/15607
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[yorickpeterse]: https://gitlab.com/yorickpeterse
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[anti-pattern]: https://en.wikipedia.org/wiki/Anti-pattern
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