通过下面sql查询参数文件在ASM磁盘中的AU分布SELECT x1.file_number,

x1.name,

x2.GROUP_KFFXP,

x2.DISK_KFFXP,

x2.AU_KFFXP,

x3.path

FROM (SELECT *

FROM (SELECT t1.GROUP_NUMBER, t1.FILE_NUMBER, t2.NAME, rownum AS rn

FROM v$asm_file t1

LEFT JOIN v$asm_alias t2

ON t1.FILE_NUMBER = t2.FILE_NUMBER

WHERE t1.type = ‘PARAMETERFILE‘)

WHERE rn = 1) x1

JOIN x$kffxp x2

ON x1.file_number = x2.number_kffxp

JOIN v$asm_disk x3

ON x3.GROUP_NUMBER = x2.GROUP_KFFXP

18     AND x3.DISK_NUMBER = x2.disk_kffxp

19  ;

FILE_NUMBER NAME GROUP_KFFXP DISK_KFFXP   AU_KFFXP PATH

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

265 spfileorcl.ora   1      0       1015 /dev/asm-diskb

265 spfileorcl.ora   1      1       1018 /dev/asm-diskc

由于asm磁盘组是冗余方式，这里从其中一个disk复制即可

下面通过dd命令复制[[email protected] ~]# dd if=/dev/asm-diskb skip=1015 of=/tmp/spfile01.ora bs=1024k count=1

1+0 records in

1+0 records out

1048576 bytes (1.0 MB) copied, 0.004159 seconds, 252 MB/s

[[email protected] ~]# strings /tmp/spfile01.ora

orcl.__db_cache_size=96468992

orcl.__java_pool_size=4194304

orcl.__large_pool_size=4194304

orcl.__oracle_base=‘/u01/app/oracle‘#ORACLE_BASE set from environment

orcl.__pga_aggregate_target=150994944

orcl.__sga_target=268435456

orcl.__shared_io_pool_size=0

orcl.__shared_pool_size=155189248

orcl.__streams_pool_size=0

*.audit_file_dest=‘/u01/app/oracle/admin/orcl/adump‘

*.audit_trail=‘db‘

*.compatible=‘11.2.0.0.0‘

*.control_files=‘+DATA/orcl/controlfile/current.260.855531771‘,‘+FRA/orcl

/controlfile/current.256.855531771‘

*.db_block_size=8192

*.db_create_file_dest=‘+DATA‘

*.db_domain=‘‘

*.db_name=‘orcl‘

*.db_recovery_file_dest=‘+FRA‘

*.db_recovery_file_dest_size=4070572032

*.diagnostic_dest=‘/u01/app/oracle‘

*.dispatchers=‘(PROTOCOL=TCP) (SERVICE=orclXDB)‘

*.memory_target=418381824

*.nls_language=‘SIMPLIFIED CHINESE‘

*.nls_territory=‘CHINA‘

*.open_cursors=300

*.processes=150

*.remote_login_passwordfile=‘EXCLUSIVE‘

*.undo_tablespace=‘UNDOTBS1‘

也可以根据下面命令dd，由于默认AU size为1M，块为8k, 也就是1个au 等于 1m/8k=128个快，因此如果按照Oracle快计算可知要跳过1015*(1m/8k)=129920个数据快，那么从1299920到后面的连续128个数据块就是参数文件内容了，然后dd如下[[email protected] ~]# dd if=/dev/asm-diskb of=/tmp/spfile2.ora bs=8192 skip=129920 count=128

128+0 records in

128+0 records out

1048576 bytes (1.0 MB) copied, 0.003003 seconds, 349 MB/s

[[email protected] ~]# strings /tmp/spfile2.ora

orcl.__db_cache_size=96468992

orcl.__java_pool_size=4194304

orcl.__large_pool_size=4194304

orcl.__oracle_base=‘/u01/app/oracle‘#ORACLE_BASE set from environment

orcl.__pga_aggregate_target=150994944

orcl.__sga_target=268435456

orcl.__shared_io_pool_size=0

orcl.__shared_pool_size=155189248

orcl.__streams_pool_size=0

*.audit_file_dest=‘/u01/app/oracle/admin/orcl/adump‘

*.audit_trail=‘db‘

*.compatible=‘11.2.0.0.0‘

*.control_files=‘+DATA/orcl/controlfile/current.260.855531771‘,‘+FRA/orcl

/controlfile/current.256.855531771‘

*.db_block_size=8192

*.db_create_file_dest=‘+DATA‘

*.db_domain=‘‘

*.db_name=‘orcl‘

*.db_recovery_file_dest=‘+FRA‘

*.db_recovery_file_dest_size=4070572032

*.diagnostic_dest=‘/u01/app/oracle‘

*.dispatchers=‘(PROTOCOL=TCP) (SERVICE=orclXDB)‘

*.memory_target=418381824

*.nls_language=‘SIMPLIFIED CHINESE‘

*.nls_territory=‘CHINA‘

*.open_cursors=300

*.processes=150

*.remote_login_passwordfile=‘EXCLUSIVE‘

*.undo_tablespace=‘UNDOTBS1‘

可以看到两种dd方式内容一致。

下面是从disk /dev/asm-diskc中复制[[email protected] ~]# dd if=/dev/asm-diskc of=/tmp/spfile3.ora bs=1024k skip=1018 count=1

1+0 records in

1+0 records out

1048576 bytes (1.0 MB) copied, 0.05252 seconds, 20.0 MB/s

[[email protected] ~]# strings /tmp/spfile3.ora

orcl.__db_cache_size=96468992

orcl.__java_pool_size=4194304

orcl.__large_pool_size=4194304

orcl.__oracle_base=‘/u01/app/oracle‘#ORACLE_BASE set from environment

orcl.__pga_aggregate_target=150994944

orcl.__sga_target=268435456

orcl.__shared_io_pool_size=0

orcl.__shared_pool_size=155189248

orcl.__streams_pool_size=0

*.audit_file_dest=‘/u01/app/oracle/admin/orcl/adump‘

*.audit_trail=‘db‘

*.compatible=‘11.2.0.0.0‘

*.control_files=‘+DATA/orcl/controlfile/current.260.855531771‘,‘+FRA/orcl

/controlfile/current.256.855531771‘

*.db_block_size=8192

*.db_create_file_dest=‘+DATA‘

*.db_domain=‘‘

*.db_name=‘orcl‘

*.db_recovery_file_dest=‘+FRA‘

*.db_recovery_file_dest_size=4070572032

*.diagnostic_dest=‘/u01/app/oracle‘

*.dispatchers=‘(PROTOCOL=TCP) (SERVICE=orclXDB)‘

*.memory_target=418381824

*.nls_language=‘SIMPLIFIED CHINESE‘

*.nls_territory=‘CHINA‘

*.open_cursors=300

*.processes=150

*.remote_login_passwordfile=‘EXCLUSIVE‘

*.undo_tablespace=‘UNDOTBS1‘

本文出自 “专注于Oracle性能调优” 博客，谢绝转载！

原文：http://5073392.blog.51cto.com/5063392/1574460