IBM Support

MA43859 - LIC-DB-OTHER-PERFM SMP IMPLEMENTATION LEADS TO POOR SQL QUERY PERFORMANCE

 APAR (Authorized Program Analysis Report)

Abstract

LIC-DB-OTHER-PERFM SMP IMPLEMENTATION LEADS TO POOR SQL QUERY
PERFORMANCE

Error Description

The SQL optimizer built a poor performing plan while            
implementing SMP.                                              

Problem Summary

The SQL optimizer built a poor performing plan while            
implementing SMP.                                              

Problem Conclusion

In certain situations, the temp result sets used to implement  
SMP takes too long to populate and the query performance        
suffers. The SQL optimizer will be adjusted to implement SMP    
differently in these situations                                

Temporary Fix

Comments

Circumvention


PTFs Available

R710 MF58723 PTF Cover Letter   4283
R720 MF58811 PTF Cover Letter   4276

Affected Modules

         
         

Affected Publications

Summary Information

Status............................................ CLOSED PER
HIPER........................................... No
Component.................................. 9400DG3DB
Failing Module.......................... RCHMGR
Reported Release................... R710
Duplicate Of..............................




System i Support

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Document information

More support for: i family

Software version: V7R1M0, V7R2M0

Operating system(s): OS/400

Reference #: MA43859

Modified date: 12 November 2014