diff --git a/xCAT-server/lib/perl/xCAT/PPC.pm b/xCAT-server/lib/perl/xCAT/PPC.pm
index 69dca264c..279d92884 100644
--- a/xCAT-server/lib/perl/xCAT/PPC.pm
+++ b/xCAT-server/lib/perl/xCAT/PPC.pm
@@ -271,6 +271,7 @@ sub process_command {
                 }
             }
 
+            Time::HiRes::sleep(0.1);
             my ($pipe, $pid) = fork_cmd( $nodes->{$least_hcp}{'nodegroup'}->[$nodes->{$least_hcp}{'index'}]->[0], 
                     $nodes->{$least_hcp}{'nodegroup'}->[$nodes->{$least_hcp}{'index'}]->[1], $request );