path: mha4mysql-manager_0.58-3/samples/scripts/power_manager
  print "Killing all mysqld instances on $real_host..\n";
  $command =
"\"killall -9 mysqld mysqld_safe; a=\\\`pidof mysqld\\\`; if [ \\\"a\\\$a\\\" = \\\"a\\\" ]; then exit 10; fi; sleep 1; a=\\\`pidof mysqld\\\`; if [ \\\"a\\\$a\\\" = \\\"a\\\" ]; then exit 10; else exit 1; fi\"";
  ( $high_ret, $low_ret ) = MHA::ManagerUtil::exec_system(
    "ssh $ssh_user_host $MHA::ManagerConst::SSH_OPT_CHECK $command");