Oracle DGHA architecture
Posted by admin on November 1st, 2013
Tags: architecture
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[转] Autotrace with bind variables
Posted by admin on September 27th, 2013
JL刚刚写的一篇autotrace与bind variables 的行为：Autotrace trick
之前我们也发现过这个问题具体SR在这里：something seems confused
Tags: oracle数据管理
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CTAS导致严重BUG一则
Posted by admin on September 25th, 2013
某国内巨头的一起CASE,在系统繁忙情况下大量的CTAS 导致数据字典表的不一致,由原来10.0.2.4版本升级到10.0.2.5之后问题依旧。
具体表现为：
1. 尝试drop这些不一致的tablespace
15:00:18 SQL> @dropts_2012.0319.150[......]
Tags: bug
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Think of bind value
Posted by admin on September 17th, 2013
Tags: training
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一次诡异的缓慢”死亡” CASE
Posted by admin on September 13th, 2013
今天下午遇到的一个诡异CASE,现象为系统诡异的死亡,目前判定为sqluldr2工具导致 (同事使用sqluldr2 用具 执行了sqluldr2_linux64_10204.bin -help 命令)
抛出的错误如下 (/var/log/message)
Sep 11 09:00:54[......]
Tags: trouble shooting
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DGHA，Dataguard自动切换方案
Posted by admin on August 15th, 2013
发布对autoswitch over dg脚本DGHA测试,此脚本针对oracle dataguard设计使用共享存储存放redo以及controlfile从而达到了切换数据0丢失。
同时切换以后,original primary database可以无缝加入整个dg集群，从而形成了datagua[......]
Tags: dataguard
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关于12c Pluggable database注册listener问题
Posted by admin on August 9th, 2013
演示一下12c中关于pdb的listener register,unregister问题
[oracle@db-42 ~]$ lsnrctl status listener1 LSNRCTL for Linux: Version 12.1.0.1.0 - Production on[......]
Tags: 12c new feature
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Some exadata disk tips
Posted by admin on July 29th, 2013
针对exadata最近频繁报出的IO error,做如下总结
data node alert
ORA-27603: 单元存储 I/O 错误, I/O 在磁盘 o/192.168.10.5/DATA_DM01_CD_08_dm01cel03 上失败, 偏移量 17331625984 (数[......]
Tags: Exadata
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[12c new feature] 针对 pluggable database的操作
Posted by admin on July 5th, 2013
1. create Pluggable database from NON_CDB database.
[oracle@db-42 ~]$ ora si SQL*Plus: Release 12.1.0.1.0 Production on Fri Jul 5 13:07:08 20[......]
Tags: 12c new feature
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[12c new feature] slow IO tracing by views
Posted by admin on July 3rd, 2013
根据JL,Glen Fawcett 的文章 oracle 从12c开始提供了3个视图来探测慢速的IO
SQL> desc V$LGWRIO_OUTLIER; Name Null? Type -----------------------------------[......]
Tags: 12c new feature
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