ORACLE清理归档日志.docx

清理归档日志： archive log 日志已满ORA-00257: archiver error. Connect internal only, until freed 错误的处理方法1. 用sys用户登录 sqlplus sys/passtt as sysdba2. 看看archiv log所在位置SQL show parameter log_archive_dest;NAME TYPE VALUE- - -log_archive_dest stringlog_archive_dest_1 stringlog_archive_dest_10 string3. 一般VALUE为空时，可以用archive log list;检查一下归档目录和log sequenceSQL archive log list;Database log mode Archive ModeAutomatic archival EnabledArchive destination USE_DB_RECOVERY_FILE_DESTOldest online log sequence 360Next log sequence to archive 360Current log sequence 3624. 检查flash recovery area的使用情况,可以看见archivelog已经很大了，达到96.62SQL select * from V$FLASH_RECOVERY_AREA_USAGE;FILE_TYPE PERCENT_SPACE_USED PERCENT_SPACE_RECLAIMABLE NUMBER_OF_FILES- - - -CONTROLFILE .13 0 1ONLINELOG 2.93 0 3ARCHIVELOG 96.62 0 141BACKUPPIECE 0 0 0IMAGECOPY 0 0 0FLASHBACKLOG 0 0 05. 计算flash recovery area已经占用的空间SQL select sum(percent_space_used)*3/100 from v$flash_recovery_area_usage;SUM(PERCENT_SPACE_USED)*3/100- 2.9904 6. 找到recovery目录, show parameter recoverSQL show parameter recover;NAME TYPE VALUE- - -db_recovery_file_dest string /u01/app/oracle/flash_recovery_areadb_recovery_file_dest_size big integer 5Grecovery_parallelism integer 0 7 上述结果告诉我们，归档位置用的是默认值，放在flash_recovery_area下(db_recovery_file_dest目录=/u01/app/oracle/flash_recovery_area)rootsha3 10.2.0# echo $ORACLE_BASE/u01/app/oraclerootsha3 10.2.0# cd $ORACLE_BASE/flash_recovery_area/tt/archivelog转移或清除对应的归档日志, 删除一些不用的日期目录的文件，注意保留最后几个文件（比如360以后的）-注意: 在删除归档日志后，必须用RMAN维护控制文件，否则空间显示仍然不释放。-8. rman target sys/passrootsha3 oracle# rman target sys/passRecovery Manager: Release 10.2.0.4.0 - Production on Tue Jan 20 01:41:26 2009Copyright (c) 1982, 2007, Oracle. All rights reserved.connected to target database: tt (DBID=4147983671)9. 检查一些无用的archivelogRMAN crosscheck archivelog all;10. 删除过期的归档RMAN delete expired archivelog all; delete archivelog until time sysdate-1 ; 删除截止到前一天的所有archivelog11. 再次查询，发现使用率正常，已经降到23.03SQL select * from V$FLASH_RECOVERY_AREA_USAGE;FILE_TYPE PERCENT_SPACE_USED PERCENT_SPACE_RECLAIMABLE NUMBER_OF_FILES- - - -CONTROLFILE .13 0 1ONLINELOG 2.93 0 3ARCHIVELOG 23.03 0 36BACKUPPIECE 0 0 0IMAGECOPY 0 0 0FLASHBACKLOG 0 0 0其它有用的Command:-如果archive log模式下不能正常startup,则先恢复成noarchive log,startup成功后，再shutdown;shutdown immediate;startup mount;alter database noarchivelog;alter database open;shutdown immediate;再次startup以archive log模式shutdown immediate;startup mount;show parameter log_archive_dest; alter database archivelog;archive log list; alter database open;如果还不行，则删除一些archlog logSQL select group#,sequence# from v$log; GROUP# SEQUENCE#- - 1 62 3 64 2 63原来是日志组一的一个日志不能归档SQL alter database clear unarchived logfile group 1;alter database open;最后，也可以指定位置Arch Log, 请按照如下配置select name from v$datafile;alter s