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如果非必要一般不會重啟服務(wù)器，如果重啟服務(wù)器，必須先要正確關(guān)閉oracle，然后在重啟。
人無完人，總有人會犯錯誤，其中一臺線上oracle維護(hù)者，失誤，直接將oracle服務(wù)器重啟了，重啟之后，直接造成了，數(shù)據(jù)庫提示ora-00603: ORACLE server session terminated by fatal error,
用sqlplus 登錄oracle;
1 2 3 | su - oracle
alter system set events '10046 trace name context off';
alter system set timed_statistics=false;
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然后重啟oracle，最后發(fā)現(xiàn)還是報(bào)錯，
去了oracle 的日志目錄并查找trace文件
1 2 3 4 5 6 | cd /data0/oracle/admin/dzinfoiims/bdump/
cat dzinfoiims_smon_6401.trc
SMON: following errors trapped and ignored:
ORA-01595: error freeing extent (4) of rollback segment (1))
ORA-00607: Internal error occurred while making a change to a data block
ORA-00600: internal error code, arguments: [4194], [62], [32], [], [], [], [], []
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最后幾行顯示 ora-01595，按照提示因?yàn)椴徽_關(guān)閉oracle導(dǎo)致回滾段失敗，基本上可以斷定undo表空間損壞，但是可以通過重建undo文件。
1）生成pfile
1 | SQL> create pfile from spfile
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修改pfile參數(shù)：
1 2 3 | #*.undo_management='AUTO'
*.undo_management='MANUAL'
_allow_resetlogs_corruption=true
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2）以pfile啟動數(shù)據(jù)庫
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 | SQL> startup mount pfile='/data0/oracle/product/10.2.0/db_1/dbs/initdzinfoiims.ora';
ORACLE instance started.
Total System Global Area 612368384 bytes
Fixed Size 2085872 bytes
Variable Size 373296144 bytes
Database Buffers 230686720 bytes
Redo Buffers 6299648 bytes
Database mounted.
SQL> show parameter undo
NAME TYPE
------------------------------------ ----------------------
VALUE
------------------------------
undo_management string
MANUAL
undo_retention integer
900
undo_tablespace string
UNDOTBS1
SQL> alter database open;
Database altered.
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3）新建undo表空間undotbs2
1 2 3 4 5 6 7 | SQL> create undo tablespace undotbs2 datafile '/data0/oracle/oradata/dzinfoiims/undotbs02.dbf' size 1G;
table space created.
SQL> drop tablespace undotbs1;
The deleted table space .
SQL> alter tablespace undotbs2 rename to undotbs1;
table space was alted.
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4）以spfile重啟數(shù)據(jù)庫
01 02 03 04 05 06 07 08 09 10 11 12 | SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup
ORACLE instance started.
Total System Global Area 5016387584 bytes
Fixed Size 2027640 bytes
Variable Size 671092616 bytes
Database Buffers 4328521728 bytes
Redo Buffers 14745600 bytes
Database mounted.
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本以為至此結(jié)束，但是有兩個表查詢，竟然提示ORA-00600: internal error code, arguments: [kdsgrp1], [], [], [], [], [], [], []
這是oracle的一個bug
可以通過alter日志，查看是那個表有問題
可以在dba狀態(tài)下
execute dbms_stats.delete_table_stats('iims','bbs_message_map');
PL/SQL procedure successfully completed.
接下該表，就select就沒事了。
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