最近在查调试相关资料的时候,无意看到Tess的一篇关于如何快速分析复合场景问题的博文,感觉很实用,Mark备忘. My 9 questions for a pretty thorough problem description When I call up a customer to start working on an issue I am generally looking for them to answer 9 questions in their own words. 1. What…

http://blogs.msdn.com/b/debuggingtoolbox/archive/2011/10/03/top-things-to-consider-when-troubleshooting-complex-application-issues.aspx 1- For reactive incidents: “Bring the engineer onsite because it is going to be easier to isolate the problem.” Th…

https://searchdatabase.techtarget.com.cn/7-20392/ --use_urec 详细解读: select USED_UREC from v$transaction; 4.1.delete 操作 4.1.2.一般删除 计算公式:USED_UREC=删除表记录数+删除表索引记录数(每个索引每行记录算一条记录) 假设表有2个索引,删除10条记录 4.1.2.通过索引范围条件删除记录 USED_UREC=删除表记录数+更新索引块数 假设表有1个单字段普通索引,通…

SRDC - ORA-30036: Checklist of Evidence to Supply (Doc ID 1682700.1) Action Plan 1. Execute srdc_db_undo_ora-30036.sqland collect the spool output. --srdc_db_undo_ora-30036.sql REM srdc_db_undo_ora-30036.sql REM collect Undo parameters and segment de…

Action Plan 1. Execute srdc_db_undo_ora-30013.sql as sysdba and provide the spool output --srdc_db_undo_ora-30013.sql REM srdc_db_undo_ora-30013.sql REM collect Undo parameters and segment details for troubleshooting ORA-30013 issues. define SRDCNAME…

SRDC - ORA-1562: Checklist of Evidence to Supply (Doc ID 1682728.1) Action Plan 1.  Execute srdc_db_undo_ora-1562.sqlas sysdba and provide the spool output. 以sysdba 的身份执行 --srdc_db_undo_ora-1562.sql REM srdc_db_undo_ora-1562.sql REM collect Undo para…

Copyright (c) 2018, Oracle. All rights reserved. Oracle Confidential. Click to add to Favorites Troubleshooting: High Version Count Issues (Doc ID 296377.1) To BottomTo Bottom In this DocumentPurpose Ask Questions, Get Help, And Share Your Experience…

1> 以const替换#define • 比如用const double Ratio = 1.653替换#define RATIO 1.653 因为宏定义在预处理阶段就会被替换成其所指代的内容,然后才是对替换后的内容进行编译,因此编译器永远不能发现宏的存在.此时如果宏变量RATIO出现问题,那么编译器只会报出是1.653出现问题,是不是相当莫名其妙?究其原因就是所使用的宏变量压根没进入到符号表中,编译器看不到. • 如何定义类内常量,就是对该类而言只有一份的那种变量?当然我们会想到static,…

2.2 Installing MySQL on Unix/Linux Using Generic Binaries Oracle provides a set of binary distributions of MySQL. These include binary distributions in the form of compressed tar files (files with a .tar.gz extension) for a number of platforms, as we…

Setting up NTP on Windows It's very helpful that Meinberg have provided an installer for the highly-respected and high-accurate NTP software for Windows users - my thanks to them.  This Web page provides a quick guide to installing NTP on Windows XP,…