diff --git a/async.txt b/async.txt
new file mode 100644
index 0000000..6fbccba
--- /dev/null
+++ b/async.txt
@@ -0,0 +1,15 @@
+plone.app.async is included in prod.cfg
+
+collective.documentviewer uses it.
+instance-async convert asynchronously files.
+An async db has been added to store async information.
+This avoids regular transactions (2 min) in main db.
+
+Some views can be used to follow asynchronous batches.
+* /manage-job-queue (from plone.app.async)
+* /dvasync-monitor (from dv, more basic)
+
+Problem with plone.app.async:
+* a reindex of SearchableText is done. During this process, metadata are updated. getObjSize index method is called.
+  This uses getObjSize script that is not accessible because acquisition and/or request is not available in async.
+  Solution: own dms files index method to avoid plone script.
diff --git a/zope_add_async.conf b/zope_add_async.conf
index 1c822db..90d213e 100644
--- a/zope_add_async.conf
+++ b/zope_add_async.conf
@@ -13,6 +13,3 @@
   </zeoclient>
   mount-point /async
 </zodb_db>
-
-# dvasync-monitor
-# manage-job-queue