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Diffstat (limited to 'docs')
| -rw-r--r-- | docs/releases/1.3.txt | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/docs/releases/1.3.txt b/docs/releases/1.3.txt index 39037f423c..da4eaf993d 100644 --- a/docs/releases/1.3.txt +++ b/docs/releases/1.3.txt @@ -165,6 +165,24 @@ To return to the previous rendering (without the ability to clear the model = Document widgets = {'document': forms.FileInput} +New index on database session table +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Prior to Django 1.3, the database table used by the database backend +for the :doc:`sessions </topics/http/sessions>` app had no index on +the ``expire_date`` column. As a result, date-based queries on the +session table -- such as the query that is needed to purge old +sessions -- would be very slow if there were lots of sessions. + +If you have an existing project that is using the database session +backend, you don't have to do anything to accommodate this change. +However, you may get a significant performance boost if you manually +add the new index to the session table. The SQL that will add the +index can be found by running the :djadmin:`sqlindexes` admin +command:: + + python manage.py sqlindexes sessions + .. _deprecated-features-1.3: Features deprecated in 1.3 |