Am having some problem with my script.

am calling it with cron job to run every some minutes

i recently received notice from my hosting that my script is causing problems to the server due to multiple requests per second

my question is that how can i loop using if statement because i have tested it and looks to be safe to use, because even using while loop it was skipping some condition if i say like

while (this eq to this) #then do this

it was skipping and just auto update to the database

working but sending mulitple requests per second on server and also sk
+ipping 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 run
+s 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;
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