因爲一次系統盤空間滿了，執行sql總是沒反應，或者提示空間不足。
慌亂之中輸入：shutdown abort重啓了。
重新啓動悲劇了！
SQL> alter pluggable database orclpdb open;
alter pluggable database orclpdb open
*
ERROR at line 1:
ORA-01113: file 25 needs media recovery
ORA-01110: data file 25: '/opt/oracle/g5/dbf/kt_csearch03.dbf'
後來林工進入rman執行：幫忙各種排查：list failure; advise failure; repair failure;
RMAN> advise failure;
Database Role: PRIMARY
List of Database Failures
=========================
Failure ID Priority Status Time Detected Summary
---------- -------- --------- ------------- -------
21497 CRITICAL OPEN 25-DEC-18 System datafile 9: '/opt/oracle/oradata/ORCL/ORCLpdb/system01.dbf' needs media recovery
21500 HIGH OPEN 25-DEC-18 One or more non-system datafiles need media recovery
21485 HIGH OPEN 25-DEC-18 One or more non-system datafiles are missing
analyzing automatic repair options; this may take some time
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=305 device type=DISK
analyzing automatic repair options complete
RMAN> repair failure;
Strategy: The repair includes complete media recovery with no data loss
Repair script: /opt/oracle/diag/rdbms/orcl/ORCL/hm/reco_2080152763.hm
contents of repair script:
# restore from standby and recover datafile
sql 'ORCLPDB' 'alter database datafile 15 offline';
restore ( datafile 15 from service "orcldg" );
recover datafile 15;
sql 'ORCLPDB' 'alter database datafile 15 online';
# recover datafile
sql 'ORCLPDB' 'alter database datafile 9, 10, 12, 16, 20, 21, 22, 23, 24, 25 offline';
recover datafile 9, 10, 12, 16, 20, 21, 22, 23, 24, 25;
sql 'ORCLPDB' 'alter database datafile 9, 10, 12, 16, 20, 21, 22, 23, 24, 25 online';
Do you really want to execute the above repair (enter YES or NO)? yes
executing repair script
sql statement: alter database datafile 15 offline
Starting restore at 25-DEC-18
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: using network backup set from service orcldg
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00015 to /opt/oracle/oradata/ORCL/apple.dbf
channel ORA_DISK_1: restore complete, elapsed time: 00:00:07
Finished restore at 25-DEC-18
Starting recover at 25-DEC-18
using channel ORA_DISK_1
starting media recovery
media recovery failed
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of repair command at 12/25/2018 12:10:10
RMAN-03015: error occurred in stored script Repair Script
ORA-00283: recovery session canceled due to errors
RMAN-11003: failure during parse/execution of SQL statement: alter database recover
if needed datafile 15
ORA-00283: recovery session canceled due to errors
ORA-01110: data file 15: '/opt/oracle/oradata/ORCL/apple.dbf'
ORA-01122: database file 15 failed verification check
ORA-01110: data file 15: '/opt/oracle/oradata/ORCL/apple.dbf'
ORA-01130: database file version 12.2.0.1.0 incompatible with ORACLE version 12.2.0.0.0
然後下面會有一些原因分析。
後來看了這個地址：https://blog.csdn.net/e_wsq/article/details/79596005
最後在rman下面執行：recover datafile 23;
RMAN> recover datafile 23;
Starting recover at 25-DEC-18
using channel ORA_DISK_1
starting media recovery
media recovery complete, elapsed time: 00:00:00
Finished recover at 25-DEC-18
再次執行：alter pluggable database orclpdb open; 終於搞定！
總結
（1）系統盤，放一個2G的文件，一旦空間滿了，刪除掉可以順利執行sql (最後問題搞定後，記得再傳上去。)
比如執行：alter database tempfile '/opt/oracle/oradata/ORCL/ORCLpdb/temp01.dbf' resize 1024M;
（2）林工說的，不要輕易執行：shutdown abort;出問題很麻煩。
（3）redo能移都移走吧。
（4）定期 backup database;