diff --git a/datastore_server/etc/service.properties b/datastore_server/etc/service.properties
index 3a658738d23b7d167013fdf052c25f34615ecf3b..9b3085f4aa32dfeb67b0bc3e87c84c62f518e18d 100644
--- a/datastore_server/etc/service.properties
+++ b/datastore_server/etc/service.properties
@@ -393,6 +393,7 @@ archiver.class = ch.systemsx.cisd.openbis.dss.generic.server.plugins.standard.Rs
 archiver.destination = /Users/openbis/dest
 # indicates if data should be synchronized when local copy differs from one in archive (default: true)
 archiver.synchronize-archive = true
+archiver.batch-size-in-bytes = 20000000
 
 # ---------------------------------------------------------------------------
 # maintenance plugins configuration