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SE50954 - OSP-DB-OTHER-RCAD-MSGSQL7917

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 APAR (Authorized Program Analysis Report)

Abstract

OSP-DB-OTHER-RCAD-MSGSQL7917

Error Description

  Additional locking of a QDT, added to prevent incorrect      
results, seems responsible for some performance issues.  The    
joblog shows MSGSQL7917.  A STRDBMON collection shows a QVC24  
value of AD.                                                    
  Also, space location locks are accumulating on objects that no
longer exist on the system.                                    

Problem Summary

****************************************************************
* PROBLEM: (SE50954) Licensed Program = 5770SS1                *
*           Severe Performance Degradation                     *
****************************************************************
* USERS AFFECTED: All IBM i operating system users for i 7.1.  *
****************************************************************
* RECOMMENDATION: Apply PTF SI45960 for i 7.1.                 *
****************************************************************
  Additional locking of a QDT, added to prevent incorrect      
results, seems responsible for some performance issues.  The    
joblog shows MSGSQL7917.  A STRDBMON collection shows a QVC24  
value of AD.                                                    
  Also, space location locks are accumulating on objects that no
longer exist on the system.                                    

Problem Conclusion

  Changes have been made to the locking to allow the old        
behavior if we know the access plan (AP) is being rebuilt for a
reason other than the location of the file(s) has changed.      
  The space location locks will no longer be orphaned.          

Temporary Fix

                        *********                              
                        * HIPER *                              
                        *********                              

Comments

Circumvention


PTFs Available

R710 SI45960 PTF Cover Letter   2279

Affected Modules

         
         

Affected Publications

Summary Information

Status............................................ CLOSED PER
HIPER........................................... Yes
Component.................................. 5770SS1DBSI6
Failing Module.......................... RCHMGR
Reported Release................... R710
Duplicate Of..............................




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Document Information

Modified date:
15 July 2016