Select para obtener cada cuanto se produce un cambio de redos por hora
set line 500 set pages 500 select to_char(first_time,'YYYY-MON-DD') day, to_char(sum(decode(to_char(first_time,'HH24'),'00',1,0)),'99') "00", to_char(sum(decode(to_char(first_time,'HH24'),'01',1,0)),'99') "01", to_char(sum(decode(to_char(first_time,'HH24'),'02',1,0)),'99') "02", to_char(sum(decode(to_char(first_time,'HH24'),'03',1,0)),'99') "03", to_char(sum(decode(to_char(first_time,'HH24'),'04',1,0)),'99') "04", to_char(sum(decode(to_char(first_time,'HH24'),'05',1,0)),'99') "05", to_char(sum(decode(to_char(first_time,'HH24'),'06',1,0)),'99') "06", to_char(sum(decode(to_char(first_time,'HH24'),'07',1,0)),'99') "07", to_char(sum(decode(to_char(first_time,'HH24'),'08',1,0)),'99') "08", to_char(sum(decode(to_char(first_time,'HH24'),'09',1,0)),'99') "09", to_char(sum(decode(to_char(first_time,'HH24'),'10',1,0)),'99') "10", to_char(sum(decode(to_char(first_time,'HH24'),'11',1,0)),'99') "11", to_char(sum(decode(to_char(first_time,'HH24'),'12',1,0)),'99') "12", to_char(sum(decode(to_char(first_time,'HH24'),'13',1,0)),'99') "13", to_char(sum(decode(to_char(first_time,'HH24'),'14',1,0)),'99') "14", to_char(sum(decode(to_char(first_time,'HH24'),'15',1,0)),'99') "15", to_char(sum(decode(to_char(first_time,'HH24'),'16',1,0)),'99') "16", to_char(sum(decode(to_char(first_time,'HH24'),'17',1,0)),'99') "17", to_char(sum(decode(to_char(first_time,'HH24'),'18',1,0)),'99') "18", to_char(sum(decode(to_char(first_time,'HH24'),'19',1,0)),'99') "19", to_char(sum(decode(to_char(first_time,'HH24'),'20',1,0)),'99') "20", to_char(sum(decode(to_char(first_time,'HH24'),'21',1,0)),'99') "21", to_char(sum(decode(to_char(first_time,'HH24'),'22',1,0)),'99') "22", to_char(sum(decode(to_char(first_time,'HH24'),'23',1,0)),'99') "23" from v$log_history group by to_char(first_time,'YYYY-MON-DD');
Select para obtener donde están situados los redos:
select group#, status, member from sys.v$logfile ORDER BY group#
Select para obtener el tamaño de los redos y el status:
select group#, bytes/1024/1024 tamaño_MB, archived, status, first_change#, first_time from v$log order BY first_change#;