diff -r ebaad720f88b -r 526ebd3988b0 web/lib/django_extensions/jobs/daily/cache_cleanup.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/django_extensions/jobs/daily/cache_cleanup.py	Wed Jan 20 12:37:40 2010 +0100
@@ -0,0 +1,23 @@
+"""
+Daily cleanup job.
+
+Can be run as a cronjob to clean out old data from the database (only expired
+sessions at the moment).
+"""
+
+from django_extensions.management.jobs import DailyJob
+
+class Job(DailyJob):
+    help = "Cache (db) cleanup Job"
+
+    def execute(self):
+        from django.conf import settings
+        import os
+
+        if settings.CACHE_BACKEND.startswith('db://'):
+            os.environ['TZ'] = settings.TIME_ZONE
+            table_name = settings.CACHE_BACKEND[5:]
+            cursor = connection.cursor()
+            cursor.execute("DELETE FROM %s WHERE %s < UTC_TIMESTAMP()" % \
+                (backend.quote_name(table_name), backend.quote_name('expires')))
+            transaction.commit_unless_managed()