基于ORA⑴9815闪回空间爆满问题的处理方法
闪回区爆满问题也是常常会遇到的问题，最关键的是闪回设置大小和归档被默许寄存在了闪回目录，恰巧今天又遇到了这个问题，就记录下处理步骤，仅供遇到这类问题的人参考。
一、毛病现象描写
1）利用端毛病信息
Error: 2016⑴1⑵6 11:45:25 ORA-00257: Archiver error. Connect AS SYSDBA only until resolved. Error: 2016⑴1⑵6 11:45:25 ORA-00257: Archiver error. Connect AS SYSDBA only until resolved. Error: 2016⑴1⑵6 11:45:25 init connpool:one or more conn open error.
2）数据库端毛病信息
Sat Nov 26 12:13:14 2016 Errors in file /home/U01/app/oracle/diag/rdbms/testdb/testdb/trace/testdb_arc2_929.trc: ORA⑴9815: WARNING: db_recovery_file_dest_size of 42949672960 bytes is 100.00% used, and has 0 remaining bytes available. Sat Nov 26 12:13:14 2016 ************************************************************************ You have following choices to free up space from recovery area: 1. Consider changing RMAN RETENTION POLICY. If you are using Data Guard, then consider changing RMAN ARCHIVELOG DELETION POLICY. 2. Back up files to tertiary device such as tape using RMAN BACKUP RECOVERY AREA command. 3. Add disk space and increase db_recovery_file_dest_size parameter to reflect the new space. 4. Delete unnecessary files using RMAN DELETE command. If an operating system command was used to delete files, then use RMAN CROSSCHECK and DELETE EXPIRED commands. ************************************************************************ Sat Nov 26 12:13:14 2016 Errors in file /home/U01/app/oracle/diag/rdbms/testdb/testdb/trace/testdb_arc2_929.trc: ORA⑴9809: limit exceeded for recovery files ORA⑴9804: cannot reclaim 524288000 bytes disk space from 42949672960 limit
二、毛病分析
从利用日志看，是由于不能归档致使的DB连接池不能被初始化打开，基本可以判断是由于数据库的归档文件所在磁盘空间满致使。
从数据库日志查看发现确切是由于闪回空间已爆满，通过查看服务器磁盘空间和闪回空间大小便可再次验证。
三、详细处理进程
1）登陆数据库服务器，查看磁盘空间使用信息
[oracle@teststd trace]$ df -h Filesystem Size Used Avail Use% Mounted on /dev/sda5 9.9G 2.6G 6.9G 28% / tmpfs 32G 18M 32G 1% /dev/shm /dev/sda1 388M 62M 307M 17% /boot /dev/sda6 1.6T 506G 1017G 34% /home /dev/sda2 20G 508M 19G 3% /var
2）查看数据库毛病日志，发现闪回空间爆满
cd /home/U01/app/oracle/diag/rdbms/testdb/testdb/trace tail -n 35 alert_testdb.log
ORA⑴9815: WARNING: db_recovery_file_dest_size of 42949672960 bytes is 100.00% used, and has 0 remaining bytes available.
3）登陆数据库，查看闪回路径和闪回空间使用情况
查看闪回空间设置大小
SQL> show parameter recover; NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ db_recovery_file_dest string /home/U01/app/oracle/fast_recovery_area db_recovery_file_dest_size big integer 40G db_unrecoverable_scn_tracking boolean TRUE recovery_parallelism integer 0
或利用SQL查看闪回路径
Col name for a60; Set line 200; SQL> select * from v$recovery_file_dest ; NAME SPACE_LIMIT SPACE_USED SPACE_RECLAIMABLE NUMBER_OF_FILES CON_ID ------------------------------------------------------- ----------- ---------- ----------------- --------------- ---------- /home/U01/app/oracle/fast_recovery_area 4.2950E+10 2.1538E+10 0 89 0
查看闪回空间所在磁盘大小
SQL> !df -h /home/U01/app/oracle/fast_recovery_area Filesystem Size Used Avail Use% Mounted on /dev/sda6 1.6T 504G 1019G 34% /home
查看闪回目录使用大小
SQL> !du -hs /home/U01/app/oracle/fast_recovery_area 40G /home/U01/app/oracle/fast_recovery_area
查看闪回空间使用情况
SQL> select * from V$RECOVERY_AREA_USAGE; FILE_TYPE PERCENT_SPACE_USED PERCENT_SPACE_RECLAIMABLE NUMBER_OF_FILES CON_ID ----------------------- ------------------ ------------------------- --------------- ---------- CONTROL FILE 0 0 0 0 REDO LOG 7.45 0 7 0 ARCHIVED LOG 100 0 76 0 BACKUP PIECE 0 0 0 0 IMAGE COPY 0 0 0 0 FLASHBACK LOG 0 0 0 0 FOREIGN ARCHIVED LOG 0 0 0 0 AUXILIARY DATAFILE COPY 0 0 0 0
4）删除归档、调剂闪回区大小
从上面看确切是闪回空间满了，而占用闪回区满的罪魁罪魁就是归档日志。要解决的方法有两个：
方案1:删除过剩的归档
最好删除归档的途径是通过rman工具做，如果直接删除文件数据库是辨认不到闪回区释放的。
[oracle@teststd trace]$ rman target / Recovery Manager: Release 12.1.0.2.0 - Production on Sat Nov 26 13:00:28 2016 Copyright (c) 1982, 2014, Oracle and/or its affiliates. All rights reserved. connected to target database: TESTDB (DBID=2708971821) RMAN> crosscheck archivelog all; RMAN> delete expired archivelog all; RMAN> DELETE NOPROMPT ARCHIVELOG ALL COMPLETED BEFORE 'SYSDATE⑺' ;
或利用下面的语句删除七天前的归档日志
RMAN> DELETE NOPROMPT ARCHIVELOG UNTIL TIME 'SYSDATE⑺' ;
注意：（一般删除归档腾出足够的闪回区后，建议调剂归档路径或调剂足够闪回区大小）
方案2：调剂闪回区大小
SQL> alter system set db_recovery_file_dest_size=100G scope=both; alter system set db_recovery_file_dest_size=100G scope=both * ERROR at line 1: ORA⑹5040: operation not allowed from within a pluggable database ###数据库为12c，不允许在pdb下操作，需要切换到sys下操作 SQL> conn /as sysdba; Connected. SQL> alter system set db_recovery_file_dest_size=100G scope=both; System altered.
5）查看闪回区使用情况和其大小
[oracle@teststd trace]$ du -hs /home/U01/app/oracle/fast_recovery_area 27G /home/U01/app/oracle/fast_recovery_area SQL> select * from V$RECOVERY_AREA_USAGE; FILE_TYPE PERCENT_SPACE_USED PERCENT_SPACE_RECLAIMABLE NUMBER_OF_FILES CON_ID ----------------------- ------------------ ------------------------- --------------- ---------- CONTROL FILE 0 0 0 0 REDO LOG 2.98 0 7 0 ARCHIVED LOG 17.08 0 82 0 BACKUP PIECE 0 0 0 0 IMAGE COPY 0 0 0 0 FLASHBACK LOG 0 0 0 0 FOREIGN ARCHIVED LOG 0 0 0 0 AUXILIARY DATAFILE COPY 0 0 0 0 8 rows selected.
6）通知系统管理员启动利用，正常启动
至此问题得以完全解决
以上这篇基于ORA⑴9815闪回空间爆满问题的处理方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。
文章来源：丸子建站
文章标题：基于ORA⑴9815闪回空间爆满问题的处理方法
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