Fix (APAR):  PI36346

Status:  Fix

Release:  8.5.5.5

Operating System:  AIX,HP-UX,IBM i,Inspur K-UX,Linux,Mac OS,Solaris,Windows

Supersedes Fixes:  

CMVC Defect:  xxxxxx

Byte size of APAR:  391007

Date: 2015-03-12

Abstract:  performance issue with certain object model operations

Description/symptom of problem:  
PI36346 resolves the following problem:

ERROR DESCRIPTION:                                              
Additional materialization of a tree that contains both the     
original and the copied node affects performance.               

LOCAL FIX:                                                      

PROBLEM SUMMARY

USERS AFFECTED:
 All users of IBM WebSphere Application
Server

PROBLEM DESCRIPTION:
Certain operations on a copied object
graph were causing it to be fully
materialized.

RECOMMENDATION:
None

When a copied node and it's original node are in the same
object graph, operations such as copying or moving nodes would
trigger some part of the object graph to be fully materialized.
Depending on the size of the materialized portion, this might
affect performance.

PROBLEM CONCLUSION:                                             
Some optimizations are now in place that avoid a full           
materialization of a copied object graph during certain         
operations. This materialization is delayed until it reaches a  
scenario where it is actually needed.                           
                                                                
The fix for this APAR is currently targeted for inclusion in    
fix pack 8.5.5.6.  Please refer to the Recommended Updates      
page for delivery information:                                  
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980   


Directions to apply fix:  Fix applies to Editions:
Release 8.5.5
_X_ Application Server (Express or BASE)
_X_ Network Deployment (ND)
__ Edge Components
__ Developer

Install Fix to all WebSphere installations unless special instructions are included below.

Special Instructions: None

NOTE:
The user must:
* Logged in with the same authority level when unpacking a fix, fix pack or refresh pack.
* Be at V1.4.3 or newer of the Installation Manager. Certain iFixes may require a newer version of the Installation Manager and the Installation Manager will inform you during the installation process if a newer version is required.

The IBM Information Center can provide details, if needed, on the use of the Installation Manager to apply the iFixes.
http://publib.boulder.ibm.com/infocenter/install/v1r4/index.jsp.  Shutdown WebSphere Application Server before applying the iFixes.  Restart WebSphere Application Server after applying the iFixes.

Directions to remove fix:  

The IBM Information Center can provide details, if needed, on the use of the Installation Manager to remove the iFixes.
http://publib.boulder.ibm.com/infocenter/install/v1r4/index.jsp.  Shutdown WebSphere Application Server before removing the iFixes.  Restart WebSphere Application Server after removing the iFixes.

Directions to re-apply fix:  
1) Shutdown WebSphere Application Server.

2) Follow the Fix instructions to apply the fix.

3) Restart WebSphere Application Server.



Additional Information: