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开发学院数据库DB2 DB2 for Linux, UNIX, and Windows 的锁事件,第 ... 阅读

DB2 for Linux, UNIX, and Windows 的锁事件,第 3 部分: 使用 DB2 9.7 中的锁事件监控器来解决并发性问题

 2010-08-03 00:00:00 来源:WEB开发网   
核心提示: 清单 10. 编译 db2evmonfmt 工具setPATH=C:\ProgramFiles\IBM\SQLLIB\java\jdk\bin;%PATH%javacdb2evmonfmt.java为了读取和格式化锁超时事件的信息,根据选项调用 db2evmonfmt 工具,DB2 for Li

清单 10. 编译 db2evmonfmt 工具

set PATH=C:\Program Files\IBM\SQLLIB\java\jdk\bin;%PATH% 
javac db2evmonfmt.java 

为了读取和格式化锁超时事件的信息,根据选项调用 db2evmonfmt 工具,如清单 11 所示。默认情况下,工具输出写到标准输出,所以将其输出重新指向文本文件。

清单 11. 调用 db2evmonfmt 工具来格式化为锁超时事件收集的数据

java db2evmonfmt -d sample -ue emdata.tab_locking -ftext -u username -p password 
  >locktimeout.txt 

其中的代码选项如下:

-d数据库名-ue非格式化事件表的完全许可路径(包括模式)-ftext纯文本格式(或者,通过指定 -fxml 选项设置 XML 格式)的锁事件信息输出-u数据库访问的用户 ID-p数据库访问的密码

对于锁超时事件,db2evmonfmt 生成如清单 12 所示的输出。

清单 12. 锁超时事件的 db2evmonfmt 输出

------------------------------------------------------- 
Event ID        : 1 
Event Type       : LOCKTIMEOUT 
Event Timestamp    : 2010-02-16-18.27.38.102302 
Partition of detection : 0 
------------------------------------------------------- 
 
Participant No 1 requesting lock 
---------------------------------- 
Lock Name      : 0x02000600040000000000000052 
Lock wait start time : 2010-02-16-18.27.28.086228 
Lock wait end time  : 2010-02-16-18.27.38.102302 
Lock Type      : ROW 
Lock Specifics    : ROWID=4,DATA_PARTITION_ID=0,PAGEID=0 
Lock Attributes   : 00000000 
Lock mode requested : Update 
Lock mode held    : Exclusive 
Lock Count      : 1 
Lock Hold Count   : 0 
Lock rrIID      : 0 
Lock Status     : Waiting 
Lock release flags  : 40000000 
Tablespace TID    : 2 
Tablespace Name   : USERSPACE1 
Table FID      : 6 
Table Schema     : FECHNER 
Table Name      : EMPLOYEE 
 
 
Attributes      Requester            Owner              
--------------------- ------------------------------ ------------------------------  
Participant No    1                2                
Application Handle  0342              0333               
Application ID    *LOCAL.DB2.100216172719     *LOCAL.DB2.100216172702     
Application Name   db2bp.exe            db2bp.exe            
Authentication ID   FECHNER             FECHNER             
Requesting AgentID  2172              6320               
Coordinating AgentID 2172              6320               
Agent Status     UOW Executing          UOW Waiting           
Application Action  No action            No action            
Lock timeout value  10               0                
Lock wait value    0                0                
Workload ID      1                1                
Workload Name     SYSDEFAULTUSERWORKLOAD     SYSDEFAULTUSERWORKLOAD      
Service subclass ID  13               13                
Service subclass   SYSDEFAULTSUBCLASS       SYSDEFAULTSUBCLASS        
Current Request    Execute Immediate        Close Cursor           
TEntry state     1                2                
TEntry flags1     00000000            00000000             
TEntry flags2     00000200            00000200             
Lock escalation    no               no                
Client userid                                     
Client wrkstnname                                   
Client applname                                    
Client acctng                                     
 
 
Current Activities of Participant No 1 
---------------------------------------- 
Activity ID    : 1 
Uow ID       : 1 
Package Name    : SQLC2H20 
Package Schema   : NULLID  
Package Version  : 
Package Token   : AAAAAZBZ 
Package Sectno   : 203 
Reopt value    : none 
Incremental Bind  : no 
Eff isolation   : CS 
Eff degree     : 0 
Eff locktimeout  : 10 
Stmt unicode    : no 
Stmt query ID   : 0 
Stmt nesting level : 0 
Stmt invocation ID : 0 
Stmt source ID   : 0 
Stmt pkgcache ID  : 3783866187777 
Stmt type     : Dynamic 
Stmt operation   : DML, Insert/Update/Delete 
Stmt text     : UPDATE EMPLOYEE SET BONUS = SALARY * 0.1 WHERE JOB = 'MANAGER' 
 
 
 
Past Activities of Participant No 1 
------------------------------------- 
Activities not available 
 
 
Current Activities of Participant No 2 
---------------------------------------- 
Activities not available 
 
 
Past Activities of Participant No 2 
------------------------------------- 
Past Activities wrapped: no 
 
Activity ID    : 2 
Uow ID       : 2 
Package Name    : SQLC2H20 
Package Schema   : NULLID  
Package Version  : 
Package Token   : AAAAAZBZ 
Package Sectno   : 201 
Reopt value    : none 
Incremental Bind  : no 
Eff isolation   : CS 
Eff degree     : 0 
Eff locktimeout  : 10 
Stmt unicode    : no 
Stmt query ID   : 0 
Stmt nesting level : 0 
Stmt invocation ID : 0 
Stmt source ID   : 0 
Stmt pkgcache ID  : 721554505729 
Stmt type     : Dynamic 
Stmt operation   : DML, Select (blockable) 
Stmt text     : SELECT LASTNAME, FIRSTNME, SALARY FROM EMPLOYEE ORDER BY LASTNAME ASC 
 
Activity ID    : 1 
Uow ID       : 2 
Package Name    : SQLC2H20 
Package Schema   : NULLID  
Package Version  : 
Package Token   : AAAAAZBZ 
Package Sectno   : 203 
Reopt value    : none 
Incremental Bind  : no 
Eff isolation   : CS 
Eff degree     : 0 
Eff locktimeout  : 10 
Stmt unicode    : no 
Stmt query ID   : 0 
Stmt nesting level : 0 
Stmt invocation ID : 0 
Stmt source ID   : 0 
Stmt pkgcache ID  : 3835405795329 
Stmt type     : Dynamic 
Stmt operation   : DML, Insert/Update/Delete 
Stmt text     : UPDATE EMPLOYEE SET SALARY = SALARY * 1.02 

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