Greetings monks!

I am trying to insert around 30-50K rows using DBI into a MySQL DB (5.5.56-MariaDB). I am trying to use following code (say insert1.pl) which is working for almost 6-7K rows.

#!/usr/bin/perl -w

use strict;
use DBI;
use Data::Dumper;
use POSIX qw( strftime );

my $database = 'db_name';
my $db_user = 'user';
my $db_password = 'pwd';
my $db_hostname = 'db_hostname';

my $dbh2 = DBI->connect("DBI:mysql:database=$database:host=$db_hostnam
+e",$db_user,$db_password,
    { RaiseError => 1, AutoCommit => 1, mysql_auto_reconnect => 1 } # 
+Added AutoCommit => 1, mysql_auto_reconnect => 1 while trying to make
+ it work
);
die "unable to connect to server $DBI::errstr" unless $dbh2;

my $sql2 = q^
    INSERT INTO table_name (col_1, col_2, col_3, col_4, col_5)
    VALUES ^;

while(my @row = $sth1->fetchrow_array){
    if ($row[3])
    {
        $sql2 .= "          ('" . $row[0] . "', '" . $row[1] . "', '" 
+. $row[2] . "', '" . $row[3] . "', '" . $row[4] . "'),\n";
    }
    else
    {
        $sql2 .= "          ('" . $row[0] . "', '" . $row[1] . "', '" 
+. $row[2] . "', null, '" . $row[4] . "'),\n";
    }
}
$sth1->finish();

$sql2 .= "          ('last_dummy', 'last_dummy', 'last_dummy', 'last_d
+ummy', 'last_dummy')\n";
print localtime() . "\tThe sql2:\n$sql2\n";
my $sth2 = $dbh2->prepare($sql2);
sleep 10; # Added this later while trying to make it work
$sth2->execute(); # I get for execute.
sleep 10; # Added this later while trying to make it work
$sth2->finish();

my $sql3 = "DELETE FROM table_name WHERE col_1 = 'last_dummy'";
print localtime() . "\tThe sql3:\n$sql3\n";
my $sth3 = $dbh2->prepare($sql3);
$sth3->execute();
$sth3->finish();

$dbh2->disconnect();
[download]

But when I try to insert all the rows, which at present are 27K, I see error in log like:

          ('host1', '123.456.789', 'string1', 'string4', 'Root (root@l
+ocalhost) (configure /etc/snmp/snmp.local.conf)'),
          ('host2', '123.456.743', 'string2', 'string5', 'Root (root@l
+ocalhost) (configure /etc/snmpDBD::mysql::st execute failed: MySQL se
+rver has gone away at insert1.pl line 38.
DBD::mysql::st execute failed: MySQL server has gone away at insert1.p
+l line 38.
/snmp.local.conf)'),
          ('host3', '499.456.789', 'string3', 'string6', 'Root (root@l
+ocalhost) (configure /etc/snmp/snmp.local.conf)'),
[download]

I have tried to add option for AutoCommit and auto_reconnect as I got those as suggetions while searching for reason behind the error MySQL server has gone away at

I did try to super search here for 'bulk insert', 'mysql bulk' & 'DBI insert' but didn't get what I am looking for. I also tried use diagnostics but it adds only one line in the error: Uncaught exception from user code: Issuing rollback() due to DESTROY without explicit disconnect() of DBD::mysql::db handle database=telemetry:host=<IP> at insert1.pl line 38.

I am pretty sure that there is better way to do this than how I am doing it here.

UPDATE_1:Added note after trying use diagnostics.

UPDATE_2:The 'Root (root@localhost) (configure /etc/snmp/snmp.local.conf)' is coming from data. So that is not the problem here.

UPDATE_3: Updated title to mark it as SOLVED.