Memcache query issue

I am trying to use the memcache.

I am logging the queries after and before enable memcache.

I am using following in _db_query function in database.mysql.inc I am using following code to log the queries.

if($_SERVER['REMOTE_ADDR'] == '192.168.99.180') {
$file = '/var/www/html/example/files/query.txt';
$handle = fopen($file,'a+');
fwrite($handle,$query."\r\n");
fclose($handle);
}

Before enable the memcache file size is 1.09 kb after enable the memcache the log file size is 11.09 kb.

In the memcache enable state I commented the following code then the queries are becoming 1.09 kb.

$conf = array(
'cache_inc' => './sites/all/modules/memcache/memcache.inc',
'memcache_servers' => array('localhost:11211' => 'default'),
'memcache_bins' => array('cache' => 'default','cache_views' => 'default', 'cache_page' => 'default', 'cache_path' => 'default','cache_filter' => 'default','cache_menu' => 'default'),
);

1. I think the log file size should reduce after enable the memcache is it right?...
2. Am i missed any configuration?.

I have attached the log file before and after memcache. I need your support.

Regards
R.Navaneethakrishnan.