IBM Support

IT31658: OPENING VERY LARGE INDEX PARTITION CAN CRASH IN KYSTATS_ALLOC()

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APAR status

  • Closed as program error.

Error description

  • Memory corruption possible when opening a very large index
partition, holding more than 128mio pages.
This would only occur with alice mode btree scanning turned on
(which it typically is).

The thread causing this problem might be seen in a stack ending
on:
 kystats_alloc()
 build_kybuffer()
 ptalloc()
 ...

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix Server prior to 12.10.xC14 and 14.10.xC4.  *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Update to Informix Server 12.10.xC14 or 14.10.xC4 (when      *
* available).                                                  *
****************************************************************

    



Problem conclusion


    

  • Fixed in Informix Server 12.10.xC14 and 14.10.xC4.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IT31658
    • 

  • Reported component name
    INFORMIX SERVER
    • 

  • Reported component ID
    5725A3900
    • 

  • Reported release
    C10
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2020-01-27
    • 

  • Closed date
    2020-03-04
    • 

  • Last modified date
    2020-03-04
    • 





    

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

    • 

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

    • 



Fix information


    

  • Fixed component name
    INFORMIX SERVER
    • 

  • Fixed component ID
    5725A3900
    • 



Applicable component levels


    








      
              
                            

              

              [{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSGU8G","label":"Informix Servers"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"C10","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            04 March 2020
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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