[오라클] 시각 단위 아카이브 발생 수 체크쿼리

오라클은 DB 아카이브 로그 모드 환경에서 아카이브 로그 공간이 부족하여 장애가 빈번하게 발생합니다.

그래서 아카이브 로그를 주기적으로 삭제해주어야 하는데 가장 안전한 아카이브 로그 삭제 방법은 RMAN을 통하여 아카이브를 지우는 방법이 있습니다.

(아카이브 로그 백업은 RMAN을 통해서 백업을 받고 3일 보관 및 3일 지난 것은 삭제하는 것으로 구성하는 것이 보통의 백업 구성 방법입니다.)

아카이브 로그 일일 발생량에 따라 백업 주기와 공간을 확보해야 합니다.

아래 쿼리를 이용하여 아카이브 발생량을 확인할 수 있습니다.

select  thread# "Thread#",
 substr(to_char(first_time,'yyyy/mm/dd'),1,10) "Day",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'00',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'00',1,0))) "00",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'01',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'01',1,0))) "01",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'02',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'02',1,0))) "02",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'03',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'03',1,0))) "03",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'04',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'04',1,0))) "04",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'05',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'05',1,0))) "05",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'06',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'06',1,0))) "06",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'07',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'07',1,0))) "07",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'08',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'08',1,0))) "08",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'09',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'09',1,0))) "09",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'10',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'10',1,0))) "10",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'11',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'11',1,0))) "11",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'12',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'12',1,0))) "12",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'13',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'13',1,0))) "13",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'14',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'14',1,0))) "14",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'15',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'15',1,0))) "15",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'16',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'16',1,0))) "16",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'17',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'17',1,0))) "17",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'18',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'18',1,0))) "18",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'19',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'19',1,0))) "19",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'20',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'20',1,0))) "20",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'21',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'21',1,0))) "21",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'22',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'22',1,0))) "22",
 decode(sum(decode(substr(to_char(first_time,'HH24'),1,2),'23',1,0)),0,0,sum(decode(substr(to_char(first_time,'HH24'),1,2),'23',1,0))) "23",
 decode(sum(1),0,0,sum(1)) "Per Day"
from v$log_history
where first_time >= trunc(sysdate-7)
group by thread#,substr(to_char(first_time,'yyyy/mm/dd'),1,10)
order by thread#,substr(to_char(first_time,'yyyy/mm/dd'),1,10) desc