Try something like this...

#!/usr/bin/perl

use strict;

my (@df_suu, @d_mysql_suu);

while (<DATA>) {
    push( @df_suu, $1 ) if ( /^processed.*df_suu=(\d+)/ );
    push( @d_mysql_suu, $1 ) if ( /^processed.*d_mysql_suu=(\d+)/ );
}

print "Last df_suu = " . $df_suu[-1] . "\n";
print "Last d_mysql_suu = " . $d_mysql_suu[-1] . "\n";

__DATA__
processed='destination(df_suu=12345671'
test1
processed='destination(d_mysql_suu=12345671'
test2
processed='destination(df_suu=12345672'
test3
test4
processed='destination(d_mysql_suu=12345672'
[download]