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. 关于DPM(Deformable Part Model)算法中模型结构的解释
			
    关于可变部件模型的描写叙述在作者[2010 PAMI]Object Detection with Discriminatively Trained Part Based Models的论文中已经有说明 ...
    
			
    2. 
						
  2. ORACLE功能GREATEST功能说明具体实例
			
    1           语法 GREATEST(expr_1, expr_2, ...expr_n) 2           说明 GREATEST(expr_1, expr_2, ...expr_n ...
    
			
    3. 
						
  3. padding与margin的差别
			
    之前一直没有搞懂android:padding和android:layout_margin的差别,事实上概念非常easy,padding是站在父view的角度描写叙述问题,它规定它里面的内容必须与这个 ...
    
			
    4. 
						
  4. iOS异步图片加载优化与常用开源库分析
			
    网络图片显示大体步骤: 1.下载图片: 2.图片处理(裁剪,边框等): 3.写入磁盘: 4.从磁盘读取数据到内核缓冲区: 5.从内核缓冲区复制到用户空间(内存级别拷贝): 6.解压缩为位图(耗cpu较 ...
    
			
    5. 
						
  5. 在cmd窗口下运行Java程序时无法找到主类的解决办法
			
    我是Java的初学者,昨天在cmd窗口下运行一段Java程序时总是有问题,可以编译但无法执行. 也就是javac时正确,一旦java时就不对了,提示找不到或无法加载主类,经百度谷歌再加上自己的摸索终于 ...
    
			
    6. 
						
  6. Linux磁盘管理：LVM逻辑卷的拉伸及缩减
			
    ①查看当前VG的信息,保证VG中有足够的空闲空间 通过 vgdisplay 或者 vgs 命令 [root@rusky ~]# vgs rusky-vg VG #PV #LV #SN Attr VSi ...
    
			
    7. 
						
  7. Linux磁盘管理：LVM逻辑卷的创建及使用
			
    一.创建LVM逻辑卷 事先添加了三块虚拟物理磁盘/dev/sdb 1G, /dev/sdc 2G, /dev/sdd 3G 使用fdisk –l命令查看: [root@localhost ~]# fd ...
    
			
    8. 
						
  8. @ManyToMany 两个表多对多关联
			
    两个表属于多对多关系 如 Teacher <=> Student 表teacher 主键 id 表student 主键id 中间关联表 teacher_student 两个字段 t_id  ...
    
			
    9. 
						
  9. python3下的super()
			
    大家都知道super是用来解决python钻石多重继承出现的基类重复调用的问题,这个就不赘述了,不了解的请点击. 但是我发现还有个问题在于不是钻石继承时继承先后顺序的问题,也就是如果mixin与继承的 ...
    
			
    10. 
						
  10. 下拉框上移、下移、添加、移除demo
			
    <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <sc ...
    
			
    11.