Library Cache Pin and Library Cache Lock – dbtan 谈DB https://dbtan.com dbtan 的生活、Oracle 及 Linux 等的学习笔记、观点。      说，永远易于做！ Sun, 06 Dec 2009 09:08:00 +0000 zh-Hans hourly 1 Library cache pin/lock 在Oracle 10g的增强 https://dbtan.com/2009/12/library-cache-pinlock-in-oracle-10g-enhancement.html https://dbtan.com/2009/12/library-cache-pinlock-in-oracle-10g-enhancement.html#respond Sun, 06 Dec 2009 09:08:00 +0000 http://www.dbtan.com/2009/12/library-cache-pinlock-in-oracle-10g-enhancement.html Library cache pin/lock 在Oracle 10g的增强： 从Oracle 10g开始，以上测试将不会看到同样的效果，这是因为Oracle 10g对于对象编译与重建做出了增强。注意以下测试（来自Oracle 10gR2环境）： sys@NEI> alter session[......]

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]]> https://dbtan.com/2009/12/library-cache-pinlock-in-oracle-10g-enhancement.html/feed 0 LIBRARY CACHE LOCK 等待事件 https://dbtan.com/2009/12/library-cache-lock-waiting-event.html https://dbtan.com/2009/12/library-cache-lock-waiting-event.html#respond Sun, 06 Dec 2009 07:21:00 +0000 http://www.dbtan.com/2009/12/library-cache-lock-waiting-event.html LIBRARY CACHE LOCK 等待事件： 接上篇日志，如果此时再发出一条grant或compile的命令，那么library cache lock等待事件将会出现。 Session 3：sys@NEI> alter procedure pining compile; 此进程挂起[......]

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]]> https://dbtan.com/2009/12/library-cache-lock-waiting-event.html/feed 0 LIBRARY CACHE PIN 等待事件 https://dbtan.com/2009/12/library-cache-pin-waiting-event.html https://dbtan.com/2009/12/library-cache-pin-waiting-event.html#respond Sat, 05 Dec 2009 15:02:00 +0000 http://www.dbtan.com/2009/12/library-cache-pin-waiting-event.html LIBRARY CACHE PIN 等待事件： Oracle文档上这样介绍这个等待事件：library cache pin是用来管理library cache的并发访问的，pin一个Object会引起相应的heap被载入内存中（如果此前没有被加载），pins可以在Null、Share、Exclus[......]

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]]> https://dbtan.com/2009/12/library-cache-pin-waiting-event.html/feed 0 Library Cache Pin 及 Library Cache Lock分析 https://dbtan.com/2009/12/library-cache-pin-and-library-cache-lock-analysis.html https://dbtan.com/2009/12/library-cache-pin-and-library-cache-lock-analysis.html#respond Fri, 04 Dec 2009 03:59:00 +0000 http://www.dbtan.com/2009/12/library-cache-pin-and-library-cache-lock-analysis.html Library Cache Pin 及 Library Cache Lock分析： Oracle使用两种数据结构来进行Library Cache的并发访问控制：lock和pin。lock可以被认为是解析锁，而pin则可以被认为是以读取或改变对象内容为目的所加的短时锁。之所以将Library Cac[......]

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