diff --git a/minode/sql.py b/minode/sql.py
index eaefc36..092881e 100644
--- a/minode/sql.py
+++ b/minode/sql.py
@@ -18,14 +18,27 @@ class Inventory():
         )
         self._db.executescript("""
         BEGIN;
-        CREATE TABLE IF NOT EXISTS status (vacuumtime integer);
+        CREATE TABLE IF NOT EXISTS status
+        (key text, value integer, UNIQUE(key) ON CONFLICT REPLACE);
+        INSERT INTO status VALUES ('version', 1);
         CREATE TABLE IF NOT EXISTS objects
         (vector unique, expires integer, type integer, version integer,
         stream integer, tag, data, offset integer);
         COMMIT;
         """)
         self.rowid = len(self) or None
-        # self._cur.execute('INSERT INTO status VALUES (?)', int(time.time()))
+        cur = self._db.cursor()
+        cur.execute("SELECT value FROM status WHERE key='lastvacuumtime'")
+        now = int(time.time())
+        try:
+            vacuumed = cur.fetchone()[0]
+        except TypeError:
+            pass
+        else:
+            if vacuumed < now - 86400:  # 24 hours
+                cur.execute('VACUUM')
+        cur.execute("INSERT INTO status VALUES ('lastvacuumtime', ?)", (now,))
+        self._db.commit()
 
     def __objects(self, cur):
         return (