diff --git a/surveillance/maintenance.sql b/surveillance/maintenance.sql
new file mode 100644
index 00000000..e0f8f964
--- /dev/null
+++ b/surveillance/maintenance.sql
@@ -0,0 +1,18 @@
+-----------------------------------------------------------------
+-- Maintenance de la base pgsql sur rouge, lancé par cron
+-----------------------------------------------------------------
+
+-- effacement des vieux enregistrements
+DELETE FROM upload where date< timestamp 'now' - interval '2 days';
+DELETE FROM virus where date< timestamp 'now' - interval '2 days';
+DELETE FROM flood where date< timestamp 'now' - interval '2 days';
+DELETE FROM p2p where date< timestamp 'now' - interval '2 days';
+
+-- suppression complète des entrées
+VACUUM FULL;
+
+-- réindexation des tables
+REINDEX TABLE upload;
+REINDEX TABLE virus;
+-- REINDEX TABLE flood; -- flood n'a pas d'index
+REINDEX TABLE p2p;