_debug_db_query.php에는

Array
(
    [query] => INSERT  INTO `xe_counter_status`
 (`regdate`, `unique_visitor`, `pageview`)
 VALUES (0, 0, 0)
    [elapsed_time] => 0.000308036804199219
    [connection] => Master localhost
    [module] => page
    [act] => IS
    [query_id] => counter.insertTodayStatus
    [time] => 2012-11-23 00:01:59
    [result] => Failed
    [errno] => 1062
    [errstr] => Duplicate entry '0' for key 'PRIMARY'
)

_db_slow_query.php 에는

2012-11-23 00:14 SELECT count(*) as `count`  FROM `xe_counter_log` as `counter_log`   WHERE `site_srl` = 0 and `ipaddress` = '213.186.127.8' and `regdate` like '20121123%'   
 1.495186 sec query_id:counter.getCounterLog

이런 식으로 에러와 느린 쿼리를 계속 기록하네요.