閃回區存儲空間報ORA-19815問題的處理方法
阿新 • • 發佈：2018-03-23
ORA-19815 閃回區存儲空間 查詢Oracle的alert日誌是發現ORA-19815告警日誌，具體現象如下：
【現象】
ORA-19815: WARNING: db_recovery_file_dest_size of 214748364800 bytes is 85.22% used, and has 31746169856 remaining bytes available
【分析處理思路】
1、查詢相關參數和視圖
（1）查詢db_recovery_file_dest_size和db_recovery_file_dest參數閃回區存儲空間確定位置和大小。
（2）查詢v$recovery_file_dest視圖確定db_recovery_file_dest_size
（3）查詢v$flash_recovery_area_usage視圖確定那種文件占用空間。
2、解決方法主要考慮以下三個方面：
（1）如果db_recovery_file_dest_size 較小，修改db_recovery_file_dest_size 為更大的值。
（2）如果db_recovery_file_dest指定的目錄空間不足，解決辦法：
A、可另指定空間，將源db_recovery_file_dest中的文件拷貝到該空間下；
B、為該目錄新增磁盤空間；
C、將該目錄空間中的文件備份到其他目錄，並進行壓縮。
（3）通過RMAN刪除已經失效的文件。
【實際操作】
1、查看db_recovery_file
SQL> show parameter db_recovery
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest string /home/erp_db_rec/db_recovery_d
est
db_recovery_file_dest_size big integer 200G
[oraprod@erpdb erp_db_rec]$ pwd /home/erp_db_rec [oraprod@erpdb erp_db_rec]$ du -sh db_recovery_dest/ 17G db_recovery_dest/
根據參數可以判斷db_recovery_file_dest 指定的目錄足夠大。
2、查看recovery file的使用率
SQL> set linesize 2000 SQL> col name form a40 SQL> col SPACE_LIMIT form 99999999999999 SQL> col SPACE_USED form 99999999999999 SQL> col NUMBER_OF_FILES form 9999 SQL> select rfd.NAME,rfd.SPACE_LIMIT,rfd.SPACE_USED,rfd.SPACE_USED/rfd.SPACE_LIMIT*100 as "Rate(%)",rfd.NUMBER_OF_FILES from v$recovery_file_dest rfd; NAME SPACE_LIMIT SPACE_USED Rate(%) NUMBER_OF_FILES ---------------------------------------- --------------- --------------- ---------- --------------- /home/erp_db_rec/db_recovery_dest 214748364800 183002194944 85.2170377 736
查詢發現已經使用了85.21%了。
3、查詢是哪類文件占用空間
SQL> select file_type,
percent_space_used as used,
percent_space_reclaimable as reclaimable,
number_of_files as "number"
from v$flash_recovery_area_usage;
FILE_TYPE USED RECLAIMABLE number
----------------------- ---------- ----------- ----------
CONTROL FILE 0 0 0
REDO LOG 0 0 0
ARCHIVED LOG 0 0 0
BACKUP PIECE 85.22 0 736
IMAGE COPY 0 0 0
FLASHBACK LOG 0 0 0
FOREIGN ARCHIVED LOG 0 0 0
AUXILIARY DATAFILE COPY 0 0 08 rows selected.
通過查詢可知是BACKUP PIECE使用了recovery_file_dest統計的空間。
由上述查詢可知：對db_recovery_file_dest和備份空間中的文件定期進行刪除，但是在數據庫層面為進行清理，導致v$recovery_file_dest視圖將已刪除的文件統計在內導致，判斷通過RMAN刪除無效的備份集可解決。
4、解決此問題的方法
(1)對backupset進行交叉檢查。
RMAN> crosscheck backupset; using channel ORA_DISK_1 crosschecked backup piece: found to be 'EXPIRED' backup piece handle=/home/erp_db_rec/db_recovery_dest/PROD/backupset/2017_11_07/o1_mf_annnn_TAG20171107T230006_f03lmq9w_.bkp RECID=1405 STAMP=959468407 crosschecked backup piece: found to be 'EXPIRED' ...... ...... backup piece handle=/home/erp_db_rec/db_recovery_dest/PROD/backupset/2017_11_09/o1_mf_annnn_TAG20171109T230007_f08vcrc8_.bkp RECID=1420 STAMP=959641208 crosschecked backup piece: found to be 'EXPIRED' backup piece handle=/home/erp_db_rec/db_recovery_dest/PROD/backupset/2017_11_09/o1_mf_annnn_TAG20171109T230007_f08vcrf1_.bkp RECID=1421 STAMP=959641208 crosschecked backup piece: found to be 'EXPIRED' backup piece handle=/home/erp_db_rec/db_recovery_dest/PROD/backupset/2017_11_09/o1_mf_annnn_TAG20171109T230007_f08vcrhd_.bkp RECID=1422 STAMP=959641208 crosschecked backup piece: found to be 'EXPIRED' backup piece handle=/home/erp_db_rec/db_recovery_dest/PROD/backupset/2017_11_09/o1_mf_annnn_TAG20171109T230932_f08vxdxq_.bkp RECID=1426 STAMP=959641772 ....... backup piece handle=/home/erp_db_rec/db_recovery_dest/PROD/backupset/2018_03_22/o1_mf_annnn_TAG20180322T231231_fc7kz019_.bkp RECID=2963 STAMP=971478752 crosschecked backup piece: found to be 'AVAILABLE' backup piece handle=/home/erp_db_rec/db_recovery_dest/PROD/autobackup/2018_03_22/o1_mf_s_971478753_fc7kz217_.bkp RECID=2964 STAMP=971478754 Crosschecked 1510 objects
（2）刪除無效的備份集
RMAN> delete noprompt expired backupset; using channel ORA_DISK_1 ...... backup piece handle=/backup/rman_backup/20180219/level1backup/PROD_2218_1_5asrlg89.20180219 RECID=2573 STAMP=968540425 deleted backup piece backup piece handle=/backup/rman_backup/20180219/level1backup/PROD_2217_1_59srlg89.20180219 RECID=2574 STAMP=968540425 deleted backup piece backup piece handle=/backup/rman_backup/20180219/level1backup/PROD_2219_1_5bsrlg89.20180219 RECID=2575 STAMP=968540426 Deleted 1125 EXPIRED objects
（3）使用v$recovery_file_dest驗證使用率
SQL> select rfd.NAME,rfd.SPACE_LIMIT,rfd.SPACE_USED,rfd.SPACE_USED/rfd.SPACE_LIMIT*100 as "Rate(%)",rfd.NUMBER_OF_FILES from v$recovery_file_dest rfd; NAME SPACE_LIMIT SPACE_USED Rate(%) NUMBER_OF_FILES ---------------------------------------- --------------- --------------- ---------- --------------- /home/erp_db_rec/db_recovery_dest 214748364800 18025081856 8.39358282 162
刪除無效的備份集後，空間使用率變成8.39%。
（4）查詢BACKUP PIECE 的使用情況
SQL> select file_type, 2 percent_space_used as used, 3 percent_space_reclaimable as reclaimable, 4 number_of_files as "number" 5 from v$flash_recovery_area_usage; FILE_TYPE USED RECLAIMABLE number ----------------------- ---------- ----------- ---------- CONTROL FILE 0 0 0 REDO LOG 0 0 0 ARCHIVED LOG 0 0 0 BACKUP PIECE 8.39 0 162 IMAGE COPY 0 0 0 FLASHBACK LOG 0 0 0 FOREIGN ARCHIVED LOG 0 0 0 AUXILIARY DATAFILE COPY0 0 0
8 rows selected.
完整解決ORA-19815問題。
閃回區存儲空間報ORA-19815問題的處理方法