发布时间：2013-01-23 17:05:28
故障现象：1.首先会在bdump下的alert_sid.log 内产生错误日志。内容如下 Tue Jan 22 09:47:32 2013 Errors in file /oracle/admin/bbdz/udump/bbdz_ora_3289228.trc: ORA-07445: exception encountered: core dump [evaopn2+0188][SIGSEGV] [Address not mapped to object] [0x3800000000] [] [] 在udump下产生了trac.........【阅读全文】
发布时间：2013-01-20 14:23:15
转自很详细的分析测试了chain和migrate的情况，很经典The Secrets of Oracle Row Chaining and MigrationOverviewIf you notice poor performance in your Oracle database .........【阅读全文】
发布时间：2013-01-05 14:17:52
oracle 10.2.0.5.0 今天门店反应系统比较慢，做业务做不下去了。于是我看了一下服务器的状态 发生了大量的锁等待会话 锁的类型是FB select * from v$lock_type where type='FB' 1 FB Format Block tablespace # dba NO Ensures that only one process can format data blocks in auto segment space managed table......【阅读全文】
