library cahce pin(库高速缓存pin)等待事件与库高速缓存并发性有关,当会话尝试在库高速缓存中钉住对象

以修改或检查该对象时产生该事件。会话必须获取(pin)以确保此时对象没有被其他会话更新。

当会话正在编译或分析PL/SQL过程和视图时,Oracle提交该事件。

library cache pin和library cache lock的并不是hard parse

create or replace procedure test_prc as

begin

insert into test1 select * from test1;

end;

SESSION SID=1执行该存储过程后,

SESSION SID=36去编译该过程

SQL> select sid,event from v$session_wait where event not like '%message%';

       SID EVENT

---------- ----------------------------------------------------------------

	 1 db file scattered read

	 2 pmon timer

	 3 VKTM Logical Idle Wait

	 5 DIAG idle wait

	 8 DIAG idle wait

	10 db file async I/O submit

	12 log file parallel write

	13 smon timer

	18 Streams AQ: qmn coordinator idle wait

	26 Streams AQ: qmn slave idle wait

	28 Space Manager: slave idle wait

       SID EVENT

---------- ----------------------------------------------------------------

	32 Streams AQ: waiting for time management or cleanup tasks

	36 library cache pin

	37 Data file init write

14 rows selected.

SQL> col name format a30

SQL> select SESSION_ID,NAME,P1,P2,P3,WAIT_TIME,CURRENT_OBJ#,CURRENT_FILE#,CURRENT_BLOCK#

          from v$active_session_history ash, v$event_name enm

          where ash.event#=enm.event#

           and SESSION_ID=36;   2    3    4  

SESSION_ID NAME 				  P1	     P2 	P3  WAIT_TIME CURRENT_OBJ# CURRENT_FILE# CURRENT_BLOCK#

---------- ------------------------------ ---------- ---------- ---------- ---------- ------------ ------------- --------------

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

SESSION_ID NAME 				  P1	     P2 	P3  WAIT_TIME CURRENT_OBJ# CURRENT_FILE# CURRENT_BLOCK#

---------- ------------------------------ ---------- ---------- ---------- ---------- ------------ ------------- --------------

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

	36 library cache pin		   737880368  737837676      65539	    0	       236	       1	 102139

SQL> SQL> select name, PARAMETER1,PARAMETER2,PARAMETER3 from v$event_name where name='library cache pin';

NAME			       PARAMETER1	    PARAMETER2		 PARAMETER3

------------------------------ -------------------- -------------------- ------------------------------

library cache pin	       handle address	    pin address 	 100*mode+namespace

--通过查询V$SESSION_WAIT找出正在等待”library cache pin”的session

SQL> SELECT sid,

       SUBSTR (event, 1, 30),

       TO_CHAR(p1, 'xxxxxxxx') p1_16,

       --P1RAW P1_16,

       p2,

       p3

  FROM v$session_wait

 WHERE wait_time = 0 AND event LIKE 'library cache pin%';  2    3    4    5    6    7    8  

       SID SUBSTR(EVENT,1,30)						P1_16		  P2	     P3

---------- ------------------------------------------------------------ --------- ---------- ----------

	36 library cache pin						 2bfb2930  737458808 3.3599E+14

--通过查询DBA_LOCK_INTERNAL和V$SESSION_WAIT,可得到与”library cache pin” 等待相关的object的名字

SQL> SELECT TO_CHAR (SESSION_ID, '999') sid,

       SUBSTR (LOCK_TYPE, 1, 30) TYPE,

       SUBSTR (lock_id1, 1, 23) Object_Name,

       SUBSTR (mode_held, 1, 4) HELD,

       SUBSTR (mode_requested, 1, 4) REQ,

       lock_id2 Lock_addr

  FROM dba_lock_internal

 WHERE mode_requested <> 'None' AND mode_requested <> mode_held

       AND session_id IN

              (SELECT sid

                 FROM v$session_wait

                WHERE wait_time = 0 AND event LIKE 'library cache pin%');

                   2    3    4    5    6    7    8    9   10   11   12  ;

SID  TYPE							  OBJECT_NAME					 HELD	  REQ	   LOCK_ADDR

---- ------------------------------------------------------------ ---------------------------------------------- -------- -------- -------------------------

---------------

  36 Table/Procedure/Type Definitio				  TEST.TEST_PRC 				 None	  Excl	   2BFB2930

SQL> SQL>  select sid, P1RAW,P1TEXT ,event from v$session_wait where event not like '%message%';

       SID P1RAW	    P1TEXT			   EVENT

---------- ---------------- ------------------------------ ----------------------------------------------------------------

	 1 0000000000000004 file#			   db file scattered read

	 2 0000000000000100 duration			   pmon timer

	 3 00						   VKTM Logical Idle Wait

	 5 0000000000000005 component			   DIAG idle wait

	 8 0000000000000005 component			   DIAG idle wait

	10 000000000000077A requests			   db file async I/O submit

	12 0000000000000001 files			   log file parallel write

	13 000000000000012C sleep time			   smon timer

	18 00						   Streams AQ: qmn coordinator idle wait

	26 0000000000000001 Type			   Streams AQ: qmn slave idle wait

	28 0000000000000001 Slave ID			   Space Manager: slave idle wait

       SID P1RAW	    P1TEXT			   EVENT

---------- ---------------- ------------------------------ ----------------------------------------------------------------

	32 00						   Streams AQ: waiting for time management or cleanup tasks

	36 000000002BFB2930 handle address		   library cache pin

	37 00		    Slave ID			   Space Manager: slave idle wait

14 rows selected.

SELECT s.sid, kglpnmod "Mode", kglpnreq "Req",p.kglpnhdl

    FROM x$kglpn p, v$session s

    WHERE p.kglpnuse=s.saddr

    AND kglpnhdl='&P1RAW'

SQL> SELECT s.sid, kglpnmod "Mode", kglpnreq "Req",p.kglpnhdl

    FROM x$kglpn p, v$session s

    WHERE p.kglpnuse=s.saddr  2    3  ;

       SID	 Mode	     Req KGLPNHDL

---------- ---------- ---------- --------

	36	    0	       3 2BFB2930

	 1	    2	       0 2BFB2930

这里的kglpnhdl=p1_16

       SID SUBSTR(EVENT,1,30)						P1_16		  P2	     P3

---------- ------------------------------------------------------------ --------- ---------- ----------

	36 library cache pin						 2bfb2930  737458808 3.3599E+14

000000002BFB2930 16进制就是2BFB2930 转换为10进制就是737880368 















												


											
library cahce pin的更多相关文章
	

    
								
  1. 如何使用event 10049分析定位library cache lock and library cache pin
		
    Oracle Library Cache 的 lock 与 pin 说明 一. 相关的基本概念 之前整理了一篇blog,讲了Library Cache 的机制,参考: Oracle Library c ...
    
		
    2. 
						
  2. 一次library cache pin故障的解决过程
		
    内容如下: 今天接到同事的电话,说他的一个存储过程已经run了一个多小时了,还在继续run,他觉得极不正常,按道理说不应该run这么长时间. 我说那我去看一下吧. 这个库是一个AIX上的10.2.0. ...
    
		
    3. 
						
  3. 深入理解shared pool共享池之library cache的library cache pin系列三
		
    关于library cache相关的LATCH非常多,名称差不多,我相信一些人对这些概念还是有些晕,我之前也有些晕,希望此文可以对这些概念有个更为清晰的理解,本文主要学习library cache p ...
    
		
    4. 
						
  4. 外键约束列并没有导致大量建筑指数library cache pin/library cache lock
		
    外键约束列并没有导致大量建筑指数library cache pin/library cache lock 清除一个100大数据表超过一百万线,发现已经运行了几个小时: delete B001.T_B1 ...
    
		
    5. 
						
  5. Resolving Issues of "Library Cache Pin" or "Cursor Pin S wait on X" (Doc ID 1476663.1)
		
    Doc ID 1476663.1) To Bottom In this Document   Purpose   Troubleshooting Steps   Brief Definition:   ...
    
		
    6. 
						
  6. 怎么发现RAC环境中&#39;library cache pin&#39;等待事件的堵塞者（Blocker）?
		
    怎么发现RAC环境中的'library cache pin'等待事件的堵塞者(Blocker) 參考自 How to Find the Blocker of the 'library cache pi ...
    
		
    7. 
						
  7. DBA手记（学习）-library cache pin
		
    select sid,event,p1raw from v$session_wait where event like 'library cache pin%'; select sql_text fr ...
    
		
    8. 
						
  8. Oracle单实例情况下的library cache pin的问题模拟与问题分析
		
    Oracle单实例情况下的library cache pin的问题模拟与问题分析 參考自: WAITEVENT: "library cache pin" Reference Not ...
    
		
    9. 
						
  9. library cache pin解决方法
		
    library cache pin大部分都是因为编译存储过程造成的 查找造成问题的数据库对象(一般为存储过程) SELECT * FROM v$session_wait WHERE event = ' ...
    
		
    10. 
		

	


随机推荐
	

    
									
  1. mongo  多条件 查询
			
    var query1 = Query<BaseManagerForCompanyModel>.EQ(q => q.sGuidBaseCompany, sGuidBaseCompany ...
    
			
    2. 
						
  2. redis+keeplived分布式缓存
			
    redis(三)redis+Keepalived主从热备秒级切换 博客分类: 分布式缓存Redis redis高可用Keepalived  一 简介 安装使用centos 5.10 Master 19 ...
    
			
    3. 
						
  3. 关于OS_PRIO_SELF的说明
			
    在看ucosii 中关于删除任务的函数 OSTaskDel 时看到 if (prio == OS_PRIO_SELF) {                                 /* See ...
    
			
    4. 
						
  4. redis 中文手册
			
    https://redis.readthedocs.org/en/latest/ http://www.cnblogs.com/ikodota/archive/2012/03/05/php_redis ...
    
			
    5. 
						
  5. 优雅退出 Android 应用程序的 6 种方式
			
    我们先来看看几种常见的退出方法(不优雅的方式) 一.容器式 建立一个全局容器,把所有的Activity存储起来,退出时循环遍历finish所有Activity import java.util.Arr ...
    
			
    6. 
						
  6. 如何学习H264协议
			
    如何学习h.264协议 首先,我假定你已经具有如下基础: 1 了解基本的视频知识,知道什么是YCbCr/YUV: 2 知道基本的视频压缩原理: 如果这两条还不具备,那么,停一下,补一下课.这方面的相关 ...
    
			
    7. 
						
  7. 5事件DOM零级事件跟DOM二级事件
			
    事件的行为传播,行为本身跟事件绑定没有关系:1.全新认识事件(某一个具体的行为)->行为本身:浏览器天生自带的一些行为操作->click,mouseover(mouseenter),mou ...
    
			
    8. 
						
  8. JavaScript回调函数的理解
			
    这里是个人对回调函数的一段理解 <!DOCTYPE html> <html> <head> <title>回调函数</title> < ...
    
			
    9. 
						
  9. 图解MonoForAndroid开发环境搭建
			
    电脑系统:windows 8.1 企业版 预装VS:2010旗舰版+2013 with update2旗舰版 ==================================== 1.1 安装ja ...
    
			
    10. 
						
  10. JavaScript--对象+函数
			
    1. 复杂数据类型 Object ECMAScript中的对象其实就是一组数据(属性)和功能(方法)的集合.    1) 创建Object实例:   1.使用构造函数创建,new Object()   ...
    
			
    11.