ORA-00600 [2662]

一、错误现象（alert日志中）
Errors in file /opt/oracle/admin/conner/udump/conner_ora_31607.trc:
ORA-00600: internal error code, arguments: [2662], [0], [897694446], [0], [897695488], [8388697], [], []

二、错误解释
ORA-600 [2662] “Block SCN is ahead of Current SCN”，说明当前数据库的数据块的SCN早于当前的SCN，主要是和存储在UGA变量中的dependent SCN进行比较，如果当前的SCN小于它，数据库就会产生这个ORA-600 [2662]的错误了。这个错误一共有五个参数，分别代表不同的含义
ORA-600 [2662] [a] [b] {c} [d] [e]
Arg [a] Current SCN WRAP
Arg [b] Current SCN BASE
Arg {c} dependent SCN WRAP
Arg [d] dependent SCN BASE
Arg [e] Where present this is the DBA where the dependent SCN came from.
注：897694446<897695488
三、错误原因
1.使用隐含参数_ALLOW_RESETLOGS_CORRUPTION后resetlogs打开数据库
2.硬件错误引起数据库没法写控制文件和重做日志文件
3.错误的部分恢复数据库
4.恢复了控制文件但是没有使用recover database using backup controlfile进行恢复
5.数据库crash后设置了_DISABLE_LOGGING隐含参数
6.在并行服务器环境中DLM存在问题

四、解决办法
1、如果SCN相差不多，可以通过多次重起数据库解决（每次加1）
2、通过10015 ADJUST_SCN事件来增进current SCN
1）计算level
1.1) Arg {c}* 4得出一个数值，假设为V_Wrap
1.2) 如果Arg [d]=0，则V_Wrap值为需要的level
Arg [d] < 1073741824，V_Wrap+1为需要的level Arg [d] < 2147483648，V_Wrap+2为需要的level Arg [d] < 3221225472，V_Wrap+3为需要的level 1.3）SCN被增进了1024*1024*1024*level（level*10 billion）
2）执行内部事件
alter session set events ‘10015 trace name adjust_scn level N’;
注：mount状态下执行（open下无效）
alert日志中会出现：
Sat Aug 20 15:41:07 2011
Debugging event used to advance scn to 107374182400

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(database open)
alter session set events ‘IMMEDIATE trace name ADJUST_SCN level x’;
(database mount)
alter session set events ‘10015 trace name adjust_scn level x’;

如果相差的太多，可以使用_minimum_giga_scn来设置当前scn

KSTDUMP: End of in-memory trace dump
ORA-00600: internal error code, arguments: [2662], [0], [22851727], [0], [24096052], [8388617], [], []
你好，我按照上述方法还是不管用。
SQL> shutdown abort
ORACLE instance shut down.
SQL> startup mount
ORACLE instance started.
Total System Global Area 185323920 bytes
Fixed Size 455056 bytes
Variable Size 117440512 bytes
Database Buffers 67108864 bytes
Redo Buffers 319488 bytes
Database mounted.
SQL> alter session set events ‘ 0015 trace name adjust_scn level 1’;
Session altered.
SQL> alter database open;
ERROR:
ORA-03113: end-of-file on communication channel
SQL> exit

KSTDUMP: End of in-memory trace dump
ORA-00600: internal error code, arguments: [2662], [0], [22851727], [0], [24096052], [8388617], [], []
你好，我按照上述方法还是不管用。
SQL> shutdown abort
ORACLE instance shut down.
SQL> startup mount
ORACLE instance started.
Total System Global Area185323920 bytes
Fixed Size 455056 bytes
Variable Size 117440512 bytes
Database Buffers 67108864 bytes
Redo Buffers 319488 bytes
Database mounted.
SQL> alter session set events ‘ 0015 trace name adjust_scn level 1′;
Session altered.
SQL> alter database open;
ERROR:
ORA-03113: end-of-file on communication channel
SQL> exit

alter session set events ‘ 0015 trace name adjust_scn level 1′;
书写错误

One thought on “ORA-00600 [2662]”

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