数据库平台：SunOS 5.8 Generic_108528-23 sun4u sparc SUNW,Ultra-Enterprise
数据库版本：8.1.5.0.0
数据库症状：数据库响应缓慢，应用请求无法返回，业务操作陷于停顿，此时需要DBA介入并进行问题诊断及故障处理。
1. 登录数据库进行检查
首先我们登录数据库,检查故障现象。
经过检查发现，数据块的所有重做日志组除current外都处于active状态：
oracle:/oracle/oracle8>sqlplus "/ as sysdba"SQL*Plus: Release 8.1.5.0.0 - Production on Thu Jun 23 18:56:06 2005(c) Copyright 1999 Oracle Corporation. All rights reserved.
Connected to:
Oracle8i Enterprise Edition Release 8.1.5.0.0 - Production
With the Partitioning and Java options
PL/SQL Release 8.1.5.0.0 - Production
SQL> select * from v$log; GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- ---------
1 1 520403 31457280 1 NO ACTIVE 1.3861E+10 23-JUN-05
2 1 520404 31457280 1 NO ACTIVE 1.3861E+10 23-JUN-05
3 1 520405 31457280 1 NO ACTIVE 1.3861E+10 23-JUN-05
4 1 520406 31457280 1 NO CURRENT 1.3861E+10 23-JUN-05
5 1 520398 31457280 1 NO ACTIVE 1.3860E+10 23-JUN-05
6 1 520399 31457280 1 NO ACTIVE 1.3860E+10 23-JUN-05
7 1 520400 104857600 1 NO ACTIVE 1.3860E+10 23-JUN-05
8 1 520401 104857600 1 NO ACTIVE 1.3860E+10 23-JUN-05
9 1 520402 104857600 1 NO ACTIVE 1.3861E+10 23-JUN-059 rows selected.SQL> / GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- ---------
1 1 520403 31457280 1 NO ACTIVE 1.3861E+10 23-JUN-05
2 1 520404 31457280 1 NO ACTIVE 1.3861E+10 23-JUN-05
3 1 520405 31457280 1 NO ACTIVE 1.3861E+10 23-JUN-05
4 1 520406 31457280 1 NO CURRENT 1.3861E+10 23-JUN-05
5 1 520398 31457280 1 NO ACTIVE 1.3860E+10 23-JUN-05
6 1 520399 31457280 1 NO ACTIVE 1.3860E+10 23-JUN-05
7 1 520400 104857600 1 NO ACTIVE 1.3860E+10 23-JUN-05
8 1 520401 104857600 1 NO ACTIVE 1.3860E+10 23-JUN-05
9 1 520402 104857600 1 NO ACTIVE 1.3861E+10 23-JUN-059 rows selected. |
