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Diffstat (limited to 'docs/topics/db/optimization.txt')
| -rw-r--r-- | docs/topics/db/optimization.txt | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/docs/topics/db/optimization.txt b/docs/topics/db/optimization.txt index 671f57a8ae..0f39fae103 100644 --- a/docs/topics/db/optimization.txt +++ b/docs/topics/db/optimization.txt @@ -341,8 +341,13 @@ it on a ``QuerySet`` by calling Adding an index to your database may help to improve ordering performance. -Insert in bulk -============== +Use bulk methods +================ + +Use bulk methods to reduce the number of SQL statements. + +Create in bulk +-------------- When creating objects, where possible, use the :meth:`~django.db.models.query.QuerySet.bulk_create()` method to reduce the @@ -362,8 +367,13 @@ Note that there are a number of :meth:`caveats to this method <django.db.models.query.QuerySet.bulk_create>`, so make sure it's appropriate for your use case. -This also applies to :class:`ManyToManyFields -<django.db.models.ManyToManyField>`, so doing:: +Insert in bulk +-------------- + +When inserting objects into :class:`ManyToManyFields +<django.db.models.ManyToManyField>`, use +:meth:`~django.db.models.fields.related.RelatedManager.add` with multiple +objects to reduce the number of SQL queries. For example:: my_band.members.add(me, my_friend) |