在执行:ALTER SYSTEM SWITCH LOGFILE;时提示修改成功,但是在ASM硬盘组内归档日志空间则没有相应的归档日志文件,则说明日志切换不成功,然后再通过:SQL> ALTER SYSTEM ARCHIVE LOG CURRENT;修改时则提示如下错误:
ERROR at line 1: ORA-16014: log 2 sequence# 14 not archived, no available destinations ORA-00312: online log 2 thread 1: '+DGDATA02/udevasm/onlinelog/group_2.258.945212025'
通过查询相关日志说明,则可以是闪回空间不足导致的,查询闪回空间大小
SQL> show parameter db_recovery NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ db_recovery_file_dest string db_recovery_file_dest_size big integer 0
发现闪回空间没有设置大小导致无法进行日志切换,修改闪回空间为3G大小
SQL> alter system set db_recovery_file_dest_size=3G scope=both;
再次查询闪回空间大小:
SQL> show parameter db_recovery NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ db_recovery_file_dest string db_recovery_file_dest_size big integer 3G
通过查询已经有闪回空间了,现在则需要测试一下切换一下日志是否成功
SQL> ALTER SYSTEM SWITCH LOGFILE ; System altered.
SQL> ALTER SYSTEM ARCHIVE LOG CURRENT ; ALTER SYSTEM ARCHIVE LOG CURRENT * ERROR at line 1: ORA-16014: log 2 sequence# 14 not archived, no available destinations ORA-00312: online log 2 thread 1: '+DGDATA02/udevasm/onlinelog/group_2.258.945212025'
发现执行ALTER SYSTEM ARCHIVE LOG CURRENT时还是无法切换成功,想到在修改闪回空间大小时没有把数据库重启一下,最好重启一下数据库看看是否成功
SQL> shutdown immediate; Database closed. Database dismounted. ORACLE instance shut down.
SQL> startup; ORACLE instance started. Total System Global Area 1068937216 bytes Fixed Size 2260088 bytes Variable Size 331350920 bytes Database Buffers 729808896 bytes Redo Buffers 5517312 bytes Database mounted. Database opened.
启动后再执行一下日志切换:
SQL> ALTER SYSTEM ARCHIVE LOG CURRENT; System altered. SQL> ALTER SYSTEM SWITCH LOGFILE; System altered. SQL> ALTER SYSTEM SWITCH LOGFILE; System altered.
发现执行成功了,现在进ASM中查看是否有归档日志,在查询之前要查询一下归档存储在哪个位置
SQL> archive log list; Database log mode Archive Mode Automatic archival Enabled Archive destination +DGRECOVERY/arc Oldest online log sequence 9 Next log sequence to archive 14 Current log sequence 14
切换grid用户查询ASM硬盘组情况:
[oracle@udevasm ~]$ su - grid Password: [grid@udevasm:/home/grid]$asmcmd ASMCMD> ls DGDATA01/ DGDATA02/ DGRECOVERY/ DGSYSTEM/ GRID1/ ASMCMD> lsdg State Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name MOUNTED EXTERN N 512 4096 4194304 22520 260 0 260 0 N DGDATA01/ MOUNTED EXTERN N 512 4096 4194304 20472 14132 0 14132 0 N DGDATA02/ MOUNTED EXTERN N 512 4096 4194304 21500 21420 0 21420 0 N DGRECOVERY/ MOUNTED EXTERN N 512 4096 4194304 20472 20392 0 20392 0 N DGSYSTEM/ MOUNTED EXTERN N 512 4096 4194304 10232 10144 0 10144 0 N GRID1/ ASMCMD> cd DGRECOVERY/
切换后的数据为:
ASMCMD> lsdg State Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name MOUNTED EXTERN N 512 4096 4194304 22520 260 0 260 0 N DGDATA01/ MOUNTED EXTERN N 512 4096 4194304 20472 14132 0 14132 0 N DGDATA02/ MOUNTED EXTERN N 512 4096 4194304 21500 21420 0 21420 0 N DGRECOVERY/ MOUNTED EXTERN N 512 4096 4194304 20472 20392 0 20392 0 N DGSYSTEM/ MOUNTED EXTERN N 512 4096 4194304 10232 10144 0 10144 0 N GRID1/
查询归档空间是否有文件
ASMCMD> cd +DGRECOVERY ASMCMD> ls UDEVASM/ ASMCMD> cd UDEVASM/ ASMCMD> ls ARCHIVELOG/ ASMCMD> cd ARCHIVELOG/ ASMCMD> ls 2017_06_08/ ASMCMD> cd 2017_06_08/ ASMCMD> ls thread_1_seq_14.256.946154499 thread_1_seq_15.257.946154499 thread_1_seq_16.258.946154499 thread_1_seq_17.259.946154499 thread_1_seq_18.260.946154501 thread_1_seq_19.261.946154523 thread_1_seq_20.262.946154571 ASMCMD> pwd +DGRECOVERY/UDEVASM/ARCHIVELOG/2017_06_08
可以再次通过日志切换查询文件是否增加
SQL> ALTER SYSTEM ARCHIVE LOG CURRENT; System altered.
查询ASM结果:
ASMCMD> ls thread_1_seq_14.256.946154499 thread_1_seq_15.257.946154499 thread_1_seq_16.258.946154499 thread_1_seq_17.259.946154499 thread_1_seq_18.260.946154501 thread_1_seq_19.261.946154523 thread_1_seq_20.262.946154571 thread_1_seq_21.263.946154599
通过上述内容则可以判断日志切换是成功的,而且thread_1_seq_21.263.946154599 这一个文件就是增加的
这样日志切换就成功了
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