Oracle DataGuard環境主備庫日誌組數和大小調整
Oracle DataGuard主備庫日誌組數和大小調整：
檢查當前主備的redo日誌檔案和standby日誌檔案：
redo log:
select l.group#,l.bytes/1024/1024 mb,lf.member from v$log l,v$logfile lf where l.group#=lf.group# order by group#;
select group#,status from v$log;
standby log:
select sl.group#,sl.bytes/1024/1024 mb,lf.member from v$standby_log sl,v$logfile lf where sl.group#=lf.group# order by group#;
select group#,status from v$standby_log;
一、增減日誌檔案：
1、在主庫和備庫都設定standby_file_management為manual
alter system set standby_file_management='manual';
2、備庫上停止恢復：
alter database recover managed standby database cancel;
3、在主庫和備庫上增加或者減少online和standby日誌：
增加：
alter database add logfile group 2 ('/u02/app/oracle/oradata/ncf/redo02a.log','/u02/app/oracle/oradata/ncf/redo02b.log') size 200m;
alter database add standby logfile group 13 ('/u02/app/oracle/oradata/ncf/standby13_1.log','/u02/app/oracle/oradata/ncf/standby13_2.log') size 200m;
減少：
如果顯示狀態為clearing，則先clear，再刪除日誌：
alter database clear logfile group 8;
alter database drop logfile group 8;
host rm -rf /u02/app/oracle/oradata/ncf/redo08a.log
host rm -rf /u02/app/oracle/oradata/ncf/redo08b.log
4、在主庫和備庫設定standby_file_management為auto
alter system set standby_file_management='auto';
5、備庫上啟動同步：
alter database recover managed standby database using current logfile disconnect;
6、檢查狀態：
主庫多次執行：alter system switch logfile;
主庫：select max(sequence#) from v$archived_log;
備庫：select max(sequence#) from v$archived_log where applied='YES';
SELECT name,value,time_computed FROM V$DATAGUARD_STATS WHERE NAME like '%lag%';
二、修改日誌檔案大小：
1、在主庫和備庫都設定standby_file_management為manual
alter system set standby_file_management='manual';
2、備庫上停止恢復：
alter database recover managed standby database cancel;
3、主庫操作：
處理主庫的redo log：
select l.group#,l.bytes/1024/1024 mb,lf.member from v$log l,v$logfile lf where l.group#=lf.group# order by group#;
GROUP# MB MEMBER
---------- ---------- --------------------------------------------------
2 50 /u02/app/oracle/oradata/ncf/redo02a.log
2 50 /u02/app/oracle/oradata/ncf/redo02b.log
3 50 /u02/app/oracle/oradata/ncf/redo03a.log
3 50 /u02/app/oracle/oradata/ncf/redo03b.log
4 50 /u02/app/oracle/oradata/ncf/redo04a.log
4 50 /u02/app/oracle/oradata/ncf/redo04b.log
select group#,status from v$log;
GROUP# STATUS
---------- ----------------
2 CURRENT
3 INACTIVE
4 INACTIVE
alter database drop logfile group 4;
host rm -rf /u02/app/oracle/oradata/ncf/redo04a.log
host rm -rf /u02/app/oracle/oradata/ncf/redo04b.log
alter database add logfile group 4 ('/u02/app/oracle/oradata/ncf/redo04a.log','/u02/app/oracle/oradata/ncf/redo04b.log') size 100m;
alter database drop logfile group 3;
host rm -rf /u02/app/oracle/oradata/ncf/redo03a.log
host rm -rf /u02/app/oracle/oradata/ncf/redo03b.log
alter database add logfile group 3 ('/u02/app/oracle/oradata/ncf/redo03a.log','/u02/app/oracle/oradata/ncf/redo03b.log') size 100m;
alter system switch logfile;
select group#,status from v$log;
GROUP# STATUS
---------- ----------------
2 ACTIVE
3 CURRENT
4 UNUSED
alter system checkpoint;
select group#,status from v$log;
GROUP# STATUS
---------- ----------------
2 INACTIVE
3 CURRENT
4 UNUSED
alter database drop logfile group 2;
host rm -rf /u02/app/oracle/oradata/ncf/redo02a.log
host rm -rf /u02/app/oracle/oradata/ncf/redo02b.log
alter database add logfile group 2 ('/u02/app/oracle/oradata/ncf/redo02a.log','/u02/app/oracle/oradata/ncf/redo02b.log') size 100m;
處理主庫的standby log：
SQL> select group#,status from v$standby_log;
GROUP# STATUS
---------- ----------
10 UNASSIGNED
11 UNASSIGNED
12 UNASSIGNED
13 UNASSIGNED
alter database drop logfile group 10;
alter database drop logfile group 11;
alter database drop logfile group 12;
alter database drop logfile group 13;
host rm -rf /u02/app/oracle/oradata/ncf/standby10a.log
host rm -rf /u02/app/oracle/oradata/ncf/standby10b.log
host rm -rf /u02/app/oracle/oradata/ncf/standby11a.log
host rm -rf /u02/app/oracle/oradata/ncf/standby11b.log
host rm -rf /u02/app/oracle/oradata/ncf/standby12a.log
host rm -rf /u02/app/oracle/oradata/ncf/standby12b.log
host rm -rf /u02/app/oracle/oradata/ncf/standby13a.log
host rm -rf /u02/app/oracle/oradata/ncf/standby13b.log
alter database add standby logfile group 10 ('/u02/app/oracle/oradata/ncf/standby10a.log','/u02/app/oracle/oradata/ncf/standby10b.log') size 100m;
alter database add standby logfile group 11 ('/u02/app/oracle/oradata/ncf/standby11a.log','/u02/app/oracle/oradata/ncf/standby11b.log') size 100m;
alter database add standby logfile group 12 ('/u02/app/oracle/oradata/ncf/standby12a.log','/u02/app/oracle/oradata/ncf/standby12b.log') size 100m;
alter database add standby logfile group 13 ('/u02/app/oracle/oradata/ncf/standby13a.log','/u02/app/oracle/oradata/ncf/standby13b.log') size 100m;
4、備庫操作：
處理備庫的redo log：
select l.group#,l.bytes/1024/1024 mb,lf.member from v$log l,v$logfile lf where l.group#=lf.group# order by group#;
GROUP# MB MEMBER
---------- ---------- --------------------------------------------------
2 50 /u02/app/oracle/oradata/ncf/redo02a.log
2 50 /u02/app/oracle/oradata/ncf/redo02b.log
3 50 /u02/app/oracle/oradata/ncf/redo03a.log
3 50 /u02/app/oracle/oradata/ncf/redo03b.log
4 50 /u02/app/oracle/oradata/ncf/redo04a.log
4 50 /u02/app/oracle/oradata/ncf/redo04b.log
select group#,status from v$log;
GROUP# STATUS
---------- ----------------
2 CLEARING
3 CURRENT
4 CLEARING
alter database clear logfile group 4;
alter database drop logfile group 4;
host rm -rf /u02/app/oracle/oradata/ncf/redo04a.log
host rm -rf /u02/app/oracle/oradata/ncf/redo04b.log
alter database add logfile group 4 ('/u02/app/oracle/oradata/ncf/redo04a.log','/u02/app/oracle/oradata/ncf/redo04b.log') size 100m;
alter database clear logfile group 2;
alter database drop logfile group 2;
host rm -rf /u02/app/oracle/oradata/ncf/redo02a.log
host rm -rf /u02/app/oracle/oradata/ncf/redo02b.log
alter database add logfile group 2 ('/u02/app/oracle/oradata/ncf/redo02a.log','/u02/app/oracle/oradata/ncf/redo02b.log') size 100m;
針對current的日誌，需要先在主庫上切換日誌，變為clearing再處理：
select group#,status from v$log;
GROUP# STATUS
---------- ----------------
2 CURRENT
3 CLEARING
4 UNUSED
alter database clear logfile group 3;
alter database drop logfile group 3;
host rm -rf /u02/app/oracle/oradata/ncf/redo03a.log
host rm -rf /u02/app/oracle/oradata/ncf/redo03b.log
alter database add logfile group 3 ('/u02/app/oracle/oradata/ncf/redo03a.log','/u02/app/oracle/oradata/ncf/redo03b.log') size 100m;
處理備庫的standby log：
select sl.group#,sl.bytes/1024/1024 mb,lf.member from v$standby_log sl,v$logfile lf where sl.group#=lf.group# order by group#;
GROUP# MB MEMBER
---------- ---------- --------------------------------------------------
10 50 /u02/app/oracle/oradata/ncf/standby10a.log
10 50 /u02/app/oracle/oradata/ncf/standby10b.log
11 50 /u02/app/oracle/oradata/ncf/standby11a.log
11 50 /u02/app/oracle/oradata/ncf/standby11b.log
12 50 /u02/app/oracle/oradata/ncf/standby12a.log
12 50 /u02/app/oracle/oradata/ncf/standby12b.log
13 50 /u02/app/oracle/oradata/ncf/standby13a.log
13 50 /u02/app/oracle/oradata/ncf/standby13b.log
select group#,status from v$standby_log;
GROUP# STATUS
---------- ----------
10 ACTIVE
11 UNASSIGNED
12 UNASSIGNED
13 UNASSIGNED
alter database drop logfile group 11;
alter database drop logfile group 12;
alter database drop logfile group 13;
host rm -rf /u02/app/oracle/oradata/ncf/standby11a.log
host rm -rf /u02/app/oracle/oradata/ncf/standby11b.log
host rm -rf /u02/app/oracle/oradata/ncf/standby12a.log
host rm -rf /u02/app/oracle/oradata/ncf/standby12b.log
host rm -rf /u02/app/oracle/oradata/ncf/standby13a.log
host rm -rf /u02/app/oracle/oradata/ncf/standby13b.log
alter database add standby logfile group 11 ('/u02/app/oracle/oradata/ncf/standby11a.log','/u02/app/oracle/oradata/ncf/standby11b.log') size 100m;
alter database add standby logfile group 12 ('/u02/app/oracle/oradata/ncf/standby12a.log','/u02/app/oracle/oradata/ncf/standby12b.log') size 100m;
alter database add standby logfile group 13 ('/u02/app/oracle/oradata/ncf/standby13a.log','/u02/app/oracle/oradata/ncf/standby13b.log') size 100m;
針對active的日誌，需要先在主庫上切換日誌再處理
SQL> select group#,status from v$standby_log;
GROUP# STATUS
---------- ----------
10 UNASSIGNED
11 ACTIVE
12 UNASSIGNED
13 UNASSIGNED
alter database drop logfile group 10;
host rm -rf /u02/app/oracle/oradata/ncf/standby10a.log
host rm -rf /u02/app/oracle/oradata/ncf/standby10b.log
alter database add standby logfile group 10 ('/u02/app/oracle/oradata/ncf/standby10a.log','/u02/app/oracle/oradata/ncf/standby10b.log') size 100m;
5、在主庫和備庫設定standby_file_management為auto
alter system set standby_file_management='auto';
6、備庫上啟動同步：
alter database recover managed standby database using current logfile disconnect;
7、檢查狀態：
主庫多次執行：alter system switch logfile;
主庫：select max(sequence#) from v$archived_log;
備庫：select max(sequence#) from v$archived_log where applied='YES';
SELECT name,value,time_computed FROM V$DATAGUARD_STATS WHERE NAME like '%lag%';
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