转载于:http://www.2cto.com/database/201307/227510.html
Oracle RMAN清除归档日志

1、清除归档日志的方式

a、手动删除

使用rm 或者find方式来删除，通过该方式删除之后，在RMAN下可以通过 crosscheck archivelog all 校验归档是否失效，如下面的操作:

?

1

2

3

rm -rf arch_816906485_1_10.arc

find /u02/database/GOBO1/archive/ -ctime +0 -delete

RMAN> crosscheck archivelog all

b、使用RMAN方式清除

RMAN清除方式会自动清除磁盘上的归档日志文件，同时会释放控制文件中对应的归档日志的归档信息。

可以基于不同的条件来清除归档日志，如基于SCN，基于SEQUENCE，基于TIME等方式。

对于上述的三种方式又可以配合from, until, between .. and .. 等等子句来限定范围，方式灵活多变。

下面的命令用于校验归档日志的有效性，列出无效的归档日志，以及以何种方式清除归档日志，列出几种常用的:

?

1

2

3

4

5

6

7

8

crosscheck archivelog all; --->校验日志的可用性

list expired archivelog all; --->列出所有失效的归档日志

delete archivelog until sequence 16; --->删除log sequence为16及16之前的所有归档日志

delete archivelog all completed before 'sysdate-7'; --->删除系统时间7天以前的归档日志，不会删除闪回区有效的归档日志

delete archivelog all completed before 'sysdate - 1'; --->同上，1天以前的

delete archivelog from time 'sysdate-1'; --->注意这个命令，删除系统时间1天以内到现在的归档日志

delete noprompt archivelog all completed before 'sysdate'; --->该命令清除所有的归档日志

delete noprompt archivelog all; --->同上一命令

2、演练使用RMAN清除归档日志

?

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

[python]

robin@SZDB:~> export ORACLE_SID=GOBO1

robin@SZDB:~> rman target /

Recovery Manager: Release 10.2.0.3.0 - Production on Thu Jul 11 17:07:00 2013

connected to target database: GOBO1 (DBID=733951103)

RMAN> host;

robin@SZDB:~> cd /u02/database/GOBO1/archive/

robin@SZDB:/u02/database/GOBO1/archive> ls

arch_816906485_1_10.arc arch_816906485_1_12.arc

arch_816906485_1_11.arc arch_816906485_1_13.arc

............

robin@SZDB:/u02/database/GOBO1/archive> rm -rf arch_816906485_1_10.arc arch_816906485_1_11.arc arch_816906485_1_12.arc

robin@SZDB:/u02/database/GOBO1/archive> exit;

exit

host command complete

RMAN> crosscheck archivelog all;

released channel: ORA_DISK_1

allocated channel: ORA_DISK_1

channel ORA_DISK_1: sid=1075 devtype=DISK

archive log filename=/u02/database/GOBO1/archive/arch_816906485_1_9.arc recid=2085 stamp=817211151

validation failed for archived log

archive log filename=/u02/database/GOBO1/archive/arch_816906485_1_10.arc recid=2086 stamp=817250793

..............

validation succeeded for archived log

archive log filename=/u02/database/GOBO1/archive/arch_816906485_1_90.arc recid=2166 stamp=820458049

Crosschecked 83 objects

RMAN> list expired archivelog all;

List of Archived Log Copies

Key Thrd Seq S Low Time Name

------- ---- ------- - ----------------- ----

2086 1 10 X 20130604 11:05:51 /u02/database/GOBO1/archive/arch_816906485_1_10.arc

2087 1 11 X 20130604 22:06:17 /u02/database/GOBO1/archive/arch_816906485_1_11.arc

2088 1 12 X 20130605 19:30:53 /u02/database/GOBO1/archive/arch_816906485_1_12.arc

RMAN> delete archivelog until sequence 16;

released channel: ORA_DISK_1

allocated channel: ORA_DISK_1

channel ORA_DISK_1: sid=1075 devtype=DISK

List of Archived Log Copies

Key Thrd Seq S Low Time Name

------- ---- ------- - ----------------- ----

2084 1 8 A 20130604 09:53:17 /u02/database/GOBO1/archive/arch_816906485_1_8.arc

.................

2092 1 16 A 20130607 22:03:23 /u02/database/GOBO1/archive/arch_816906485_1_16.arc

Do you really want to delete the above objects (enter YES or NO)? yes

...............

deleted archive log

archive log filename=/u02/database/GOBO1/archive/arch_816906485_1_16.arc recid=2092 stamp=817516861

Deleted 9 objects

RMAN> delete archivelog all completed before 'sysdate-7';

released channel: ORA_DISK_1

allocated channel: ORA_DISK_1

channel ORA_DISK_1: sid=1075 devtype=DISK

List of Archived Log Copies

Key Thrd Seq S Low Time Name

------- ---- ------- - ----------------- ----

2093 1 17 A 20130608 00:01:00 /u02/database/GOBO1/archive/arch_816906485_1_17.arc

2094 1 18 A 20130608 18:00:17 /u02/database/GOBO1/archive/arch_816906485_1_18.arc

...........

deleted archive log

archive log filename=/u02/database/GOBO1/archive/arch_816906485_1_72.arc recid=2148 stamp=819847035

Deleted 56 objects

RMAN> list copy of database archivelog all;

List of Archived Log Copies

Key Thrd Seq S Low Time Name

------- ---- ------- - ----------------- ----

2149 1 73 A 20130703 23:17:13 /u02/database/GOBO1/archive/arch_816906485_1_73.arc

2150 1 74 A 20130704 22:00:19 /u02/database/GOBO1/archive/arch_816906485_1_74.arc

2151 1 75 A 20130704 22:04:40 /u02/database/GOBO1/archive/arch_816906485_1_75.arc

...............

2164 1 88 A 20130709 23:19:34 /u02/database/GOBO1/archive/arch_816906485_1_88.arc

2165 1 89 A 20130710 13:00:34 /u02/database/GOBO1/archive/arch_816906485_1_89.arc

2166 1 90 A 20130710 22:02:44 /u02/database/GOBO1/archive/arch_816906485_1_90.arc

RMAN> delete archivelog from time 'sysdate-1';

released channel: ORA_DISK_1

allocated channel: ORA_DISK_1

channel ORA_DISK_1: sid=1075 devtype=DISK

List of Archived Log Copies

Key Thrd Seq S Low Time Name

------- ---- ------- - ----------------- ----

2165 1 89 A 20130710 13:00:34 /u02/database/GOBO1/archive/arch_816906485_1_89.arc

2166 1 90 A 20130710 22:02:44 /u02/database/GOBO1/archive/arch_816906485_1_90.arc

Do you really want to delete the above objects (enter YES or NO)? yes

deleted archive log

archive log filename=/u02/database/GOBO1/archive/arch_816906485_1_89.arc recid=2165 stamp=820447373

deleted archive log

archive log filename=/u02/database/GOBO1/archive/arch_816906485_1_90.arc recid=2166 stamp=820458049

Deleted 2 objects

RMAN> delete archivelog all completed before 'sysdate - 1';

released channel: ORA_DISK_1

allocated channel: ORA_DISK_1

channel ORA_DISK_1: sid=1075 devtype=DISK

List of Archived Log Copies

Key Thrd Seq S Low Time Name

------- ---- ------- - ----------------- ----

2149 1 73 A 20130703 23:17:13 /u02/database/GOBO1/archive/arch_816906485_1_73.arc

.......................

2164 1 88 A 20130709 23:19:34 /u02/database/GOBO1/archive/arch_816906485_1_88.arc

Do you really want to delete the above objects (enter YES or NO)? yes

................

archive log filename=/u02/database/GOBO1/archive/arch_816906485_1_88.arc recid=2164 stamp=820414835

Deleted 16 objects

RMAN> sql " alter system archive log current";

sql statement: alter system archive log current

RMAN> list copy of archivelog all;

List of Archived Log Copies

Key Thrd Seq S Low Time Name

------- ---- ------- - ----------------- ----

2167 1 91 A 20130711 01:00:48 /u02/database/GOBO1/archive/arch_816906485_1_91.arc

RMAN> delete noprompt archivelog all completed before 'sysdate';

released channel: ORA_DISK_1

allocated channel: ORA_DISK_1

channel ORA_DISK_1: sid=1075 devtype=DISK

List of Archived Log Copies

Key Thrd Seq S Low Time Name

------- ---- ------- - ----------------- ----

2167 1 91 A 20130711 01:00:48 /u02/database/GOBO1/archive/arch_816906485_1_91.arc

deleted archive log

archive log filename=/u02/database/GOBO1/archive/arch_816906485_1_91.arc recid=2167 stamp=820517964

Deleted 1 objects

3、清除归档日志简单的shell脚本

?

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

[python]

#对于RAC环境或者ASM需要清除archive，使用shell脚本调用RMAN是比较妥当的方式

#其次，如果你的archive位于闪回区，制定合理的保留策略，也可以让Oracle自动老化无用的归档日志

robin@SZDB:~/dba_scripts/custom/bin> more clean_arch.sh

# +-------------------------------------------------------+

# + Clean archived log as specified time |

# + Author : Robinson |

# + Blog : http://blog.csdn.net/robinson_0612 |

# + Usage : |

# + clean_arch.sh $ORACLE_SID |

# +-------------------------------------------------------+

#

#!/bin/bash

# --------------------

# Define variable

# --------------------

if [ -f ~/.bash_profile ]; then

. ~/.bash_profile

fi

if [ -z "${1}" ];then

echo "Usage: "

echo " `basename $0` ORACLE_SID"

exit 1

fi

ORACLE_SID=$1; export ORACLE_SID

$ORACLE_HOME/bin/rman log=/users/robin/log/rman.log <

connect target /

run{

crosscheck archivelog all;

delete noprompt expired archivelog all;

delete noprompt archivelog all completed before 'sysdate - 1';

}

exit;

EOF

ITPub博客

rman清除归档日志经典资料

最新文章