diff --git a/client/fuse.go b/client/fuse.go
index a6983e593..21bf687c1 100755
--- a/client/fuse.go
+++ b/client/fuse.go
@@ -1022,6 +1022,7 @@ func parseMountOption(cfg *config.Config) (*proto.MountOptions, error) {
 		available = int64((total - used) / 3)
 		if available < opt.AheadReadTotalMem {
 			opt.AheadReadTotalMem = available
+			syslog.Printf("available ahead read mem: %v\n", available)
 		}
 	}
 	if opt.MountPoint == "" || opt.Volname == "" || opt.Owner == "" || opt.Master == "" {