working but sending mulitple requests per second on server and also skipping some condition compering 

my $query = $dbh->prepare("SELECT plates FROM pintable WHERE status =?");   
$query->execute('OK');


while( my $row = $query->fetchrow_arrayref() ) {

my $plates = $row->[0]; 

while ($STPU eq 'good')  {
# update DB with some data
}
$dbh->commit;
}


works great and not causing problems to server, but the problem it runs single task per running 


my $query = $dbh->prepare("SELECT plates FROM pintable WHERE status =?");   
$query->execute('OK');
my $row = $query->fetchrow_arrayref();

my $plates = $row->[0]; 

if ($STPU eq 'good') {

# update DB with some data

}

$dbh->commit;