Thanks for response.
When i run the code, getting error : Invalid value for shared scalar at /opt/perl-5.8.6_1/lib/5.8.6/Thread/Queue.pm line 90, <> line 10.
Posting my code here.

use strict;
use threads;
use Data::Dumper;
use Thread::Queue;

my $THREADS = 5;

my %dataEntity;

while(<>){
    chomp;
    next if !length($_);
    my ($dsName,$passwd) = split /\|/, $_;
    $dataEntity{$dsName} = $passwd;
}

my $request  = Thread::Queue->new;
my $response = Thread::Queue->new;

# Submit all requests
for my $dbname (keys %dataEntity) {
    $request->enqueue([$dbname,$dataEntity{$dbname}]);
};

# Tell each thread that we're done
for (1..$THREADS) {
    $request->enqueue(undef);
};

# Launch our threads
for (1..$THREADS) {
    async(\&getData);
};
sub getData {
    while (my $job = $request->dequeue()) {
        my ($dbname, $credentials) = @$job;
        #connect to DB, retrieve information
        my $dbh = getConn($dbname,$credentials);
        my %results;
        my $resArrRef = $dbh->selectall_arrayref("select srvname,dbnam
+e from syslogins",{ Slice => {} });
        foreach my $row ( @$resArrRef ) {
            $results{$row->{srvname}} = $row->{dbname};
        }
        $response->enqueue(\%results);
    };
    # tell our main thread we're done
    $response->enqueue( undef );
};

while (my $payload = $response->dequeue or $THREADS--) {
    print Dumper $payload;
}

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