Hi,

not an answer to your main question. But a kind of annotation looking at your code:

IMHO you're not using the possibility of prepared statements and bind variables. Look at this code:

my $dbh = $me->{DBHANDLE};
my %labels;

# Get all the different ids
my $sql = 'SELECT DISTINCT id FROM list_index ';
my $sth = $dbh->prepare($sql);
$sth->execute;

my $sql2 = 'select id, description from list_index  where id = ? order
+ by rpt_key desc limit 1';
my $sth2 = $dbh->prepare($sql2);

while(my $hashref = $sth->fetchrow_hashref) {
    $sth2->execute($hashref->{id});
    while(my $hashref2 = $sth2->fetchrow_hashref) {
        $labels{$hashref2->{id}} =  $hashref2->{id} . ' - ' . $hashref
+2->{description};
    }
}
$sth2->finish;
$sth->finish;

return \%labels;

[download]

With this code you gain two things: a) You don't prepare a new sql statement per loop iteration. b) You use bind variables which is almost always better than inserting values like you did it (sql injection). c) It should be measurable faster.

Best regards
McA

In reply to Re: Much slower DBI on RHEL6 by McA
in thread Much slower DBI on RHEL6 by MPM

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