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PM37647: EXTERNAL ENABLEMENT FOR PM24723 (IFCID 225 REAL STORAGE STATISTICS ENHANCEMENTS)

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APAR status

  • Closed as new function.

Error description

  • External enablement for APAR PM24723 (IFCID 225 REAL STORAGE
STATISTICS ENHANCEMENTS)

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED: All DB2 users.                               *
****************************************************************
* PROBLEM DESCRIPTION: This APAR provides enablement for APAR  *
*                      PM24723: IFCID 225 real storage         *
*                               statistics enhancements        *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
APAR PM24723 provides enhancements to DB2 trace records to
facilitate monitoring of real storage.  This APAR provides
enhancements for managing real storage used by DB2.

    



Problem conclusion


    

  • 



Temporary fix


    

  • *********
* HIPER *
*********

    



Comments


    

  • Real storage consumption for a given DB2 subsystem
can now be controlled via 2 system configuration
parameters.

REALSTORAGE_MANAGEMENT

This parameter will tell DB2 how to manage
real frames that are backed but are not being
used by the system. With this parameter set to
ON, unused backed real frames will be discarded
when possible. When this parameter is set to
OFF, DB2 will only unback unused frames when
critical real storage or auxiliary storage usage
is detected.  When this parameter is set to AUTO,
DB2 will unback unused frames when the system
begins to page. The default for this parameter
is AUTO.

New messages DSNV516I and DSNV517I will be
written when DB2 enters and exits real storage
contraction mode as controlled by
REALSTORAGE_MANAGEMENT.


REALSTORAGE_MAX

This parameter will bound this DB2 subsystem
to the amount of GB of real and auxiliary storage
specified in this parameter.  DB2 will terminate
if this threshold is reached.

New message DSNS003I will be written when DB2
approaches the threshold specified by
REALSTORAGE_MAX.  New message DSNS004I will be
written to indicate relief from this condition.

    



APAR Information




    

  • APAR number
    PM37647
    • 

  • Reported component name
    DB2 OS/390 & Z/
    • 

  • Reported component ID
    5740XYR00
    • 

  • Reported release
    A10
    • 

  • Status
    CLOSED  UR1
    • 

  • PE
    NoPE
    • 

  • HIPER
    YesHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2011-04-22
    • 

  • Closed date
    2011-06-09
    • 

  • Last modified date
    2011-07-05
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    
UK68659
    

    • 



Modules/Macros


    

  • DSN@XAZP DSNDQWPZ DSNDSPRM DSNTIDXA DSNTIDXB
DSNTIJUZ DSNTINST DSNTXAZH DSNTXAZP DSNWZIFA DSNZOVTB DSN6SPRC
DSN6SPRM

    



Fix information


    

  • Fixed component name
    DB2 OS/390 & Z/
    • 

  • Fixed component ID
    5740XYR00
    • 



Applicable component levels


    

  • RA10  PSY  UK68659
       UP11/06/28  P  F106
    • 



Fix is available


    

  • Select the PTF appropriate for your component level.
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Document Information


            

            


                        

            Modified date:
            

            05 July 2011
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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