my $ch
my $qcost
my $qcost_total
my $qtime_total
my $bytes_in_total
my $bytes_out_total
my $which_query
my $query_time
my $query_text
my $qcache_inval
my $qcache_inval_total
my $hdr_type
my @important_vars
my %non_monotonic_vars
sub main
sub flush_tables
sub get_changes
sub get_status_info
sub get_variables
sub version_ge
sub get_file