Code review comment for lp:~gl-az/percona-xtrabackup/bug1250375-2.1

You already have SHOW MASTER STATUS values when write_galera_info() is called. It is executed from write_binlog_info() which is called before write_galera_info(). If Executed_Gtid_Set is defined, it will not change, since the server is read-only and thus, it can be re-used.

To be safe from future code changes, you can do something like:

if (!defined($con->{master_status}) {
  get_mysql_master_status($con);
}

if ($con->{master_status}->{Executed_Gtid_Set}) {
  mysql_query($con, "FLUSH BINARY LOGS");
  ...
}