閃回區(qū)爆滿問題也是經(jīng)常會(huì)遇到的問題，最關(guān)鍵的是閃回設(shè)置大小以及歸檔被默認(rèn)存放在了閃回目錄，恰巧今天又遇到了這個(gè)問題，就記錄下處理步驟，僅供遇到這類問題的人參考。
一、錯(cuò)誤現(xiàn)象描述
1）應(yīng)用端錯(cuò)誤信息
Error: 2016-11-26 11:45:25 ORA-00257: Archiver error. Connect AS SYSDBA only until resolved.Error: 2016-11-26 11:45:25 ORA-00257: Archiver error. Connect AS SYSDBA only until resolved.Error: 2016-11-26 11:45:25 init connpool:one or more conn open error.
2）數(shù)據(jù)庫端錯(cuò)誤信息
Sat Nov 26 12:13:14 2016Errors in file /home/U01/app/oracle/diag/rdbms/testdb/testdb/trace/testdb_arc2_929.trc:ORA-19815: 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 2016Errors in file /home/U01/app/oracle/diag/rdbms/testdb/testdb/trace/testdb_arc2_929.trc:ORA-19809: limit exceeded for recovery filesORA-19804: cannot reclaim 524288000 bytes disk space from 42949672960 limit
二、錯(cuò)誤分析
從應(yīng)用日志看，是由于不能歸檔導(dǎo)致的DB連接池不能被初始化打開，基本可以判斷是由于數(shù)據(jù)庫的歸檔文件所在磁盤空間滿導(dǎo)致。
從數(shù)據(jù)庫日志查看發(fā)現(xiàn)確實(shí)是由于閃回空間已經(jīng)爆滿，通過查看服務(wù)器磁盤空間以及閃回空間大小即可再次驗(yàn)證。
三、詳細(xì)處理過程
1）登陸數(shù)據(jù)庫服務(wù)器，查看磁盤空間使用信息
[oracle@teststd trace]$ df -hFilesystem 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）查看數(shù)據(jù)庫錯(cuò)誤日志，發(fā)現(xiàn)閃回空間爆滿
cd /home/U01/app/oracle/diag/rdbms/testdb/testdb/tracetail -n 35 alert_testdb.log
ORA-19815: WARNING: db_recovery_file_dest_size of 42949672960 bytes is 100.00% used, and has 0 remaining bytes available.
3）登陸數(shù)據(jù)庫，查看閃回路徑以及閃回空間使用情況
查看閃回空間設(shè)置大小
SQL> show parameter recover; NAME TYPE VALUE------------------------------------ ----------- ------------------------------db_recovery_file_dest string /home/U01/app/oracle/fast_recovery_areadb_recovery_file_dest_size big integer 40Gdb_unrecoverable_scn_tracking boolean TRUErecovery_parallelism integer 0
或者利用SQL查看閃回路徑
Col name for a60;Set line 200;SQL> select * from v$recovery_file_dest ; NAME SPACE_LIMIT SPACE_USED SPACE_RECLAIMABLE NUMBER_OF_FILES CON_ID------------------------------------------------------- ----------- ---------- ----------------- --------------- ----------/home/U01/app/oracle/fast_recovery_area 4.2950E+10 2.1538E+10 0 89 0
查看閃回空間所在磁盤大小
SQL> !df -h /home/U01/app/oracle/fast_recovery_areaFilesystem Size Used Avail Use% Mounted on/dev/sda6 1.6T 504G 1019G 34% /home
查看閃回目錄使用大小
SQL> !du -hs /home/U01/app/oracle/fast_recovery_area40G /home/U01/app/oracle/fast_recovery_area
查看閃回空間使用情況
SQL> select * from V$RECOVERY_AREA_USAGE; FILE_TYPE PERCENT_SPACE_USED PERCENT_SPACE_RECLAIMABLE NUMBER_OF_FILES CON_ID----------------------- ------------------ ------------------------- --------------- ----------CONTROL FILE 0 0 0 0REDO LOG 7.45 0 7 0ARCHIVED LOG 100 0 76 0BACKUP PIECE 0 0 0 0IMAGE COPY 0 0 0 0FLASHBACK LOG 0 0 0 0FOREIGN ARCHIVED LOG 0 0 0 0AUXILIARY DATAFILE COPY 0 0 0 0
4）刪除歸檔、調(diào)整閃回區(qū)大小
從上面看確實(shí)是閃回空間滿了，而占用閃回區(qū)滿的罪魁禍?zhǔn)拙褪菤w檔日志。要解決的方法有兩個(gè)：
方案1:刪除多余的歸檔
最佳刪除歸檔的途徑是通過rman工具做，如果直接刪除文件數(shù)據(jù)庫是識(shí)別不到閃回區(qū)釋放的。
[oracle@teststd trace]$ rman target /Recovery Manager: Release 12.1.0.2.0 - Production on Sat Nov 26 13:00:28 2016Copyright (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 'SYSDATE-7' ;
或者利用下面的語句刪除七天前的歸檔日志
RMAN> DELETE NOPROMPT ARCHIVELOG UNTIL TIME 'SYSDATE-7' ;
注意：（一般刪除歸檔騰出足夠的閃回區(qū)后，建議調(diào)整歸檔路徑或者調(diào)整足夠閃回區(qū)大小）
方案2：調(diào)整閃回區(qū)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:ORA-65040: operation not allowed from within a pluggable database###數(shù)據(jù)庫為12c，不允許在pdb下操作，需要切換到sys下操作SQL> conn /as sysdba;Connected.SQL> alter system set db_recovery_file_dest_size=100G scope=both; System altered.
5）查看閃回區(qū)使用情況和其大小
[oracle@teststd trace]$ du -hs /home/U01/app/oracle/fast_recovery_area27G /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 0REDO LOG 2.98 0 7 0ARCHIVED LOG 17.08 0 82 0BACKUP PIECE 0 0 0 0IMAGE COPY 0 0 0 0FLASHBACK LOG 0 0 0 0FOREIGN ARCHIVED LOG 0 0 0 0AUXILIARY DATAFILE COPY 0 0 0 0 8 rows selected.
6）通知系統(tǒng)管理員啟動(dòng)應(yīng)用，正常啟動(dòng)
至此問題得以徹底解決
以上這篇基于ORA-19815閃回空間爆滿問題的處理方法就是小編分享給大家的全部內(nèi)容了，希望能給大家一個(gè)參考，也希望大家多多支持武林網(wǎng)。
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