IBM Support

IT31807: EXCESSIVE MEMORY USAGE DURING ARCHIVE WHEN CHUNK CONTAINS 2,147,483,647 PAGES

Subscribe to this APAR

By subscribing, you receive periodic emails alerting you to the status of the APAR, along with a link to the fix after it becomes available. You can track this item individually or track all items by product.

Notify me when this APAR changes.

Notify me when an APAR for this component changes.

 

APAR status

  • Closed as program error.

Error description

  • The maximum number of pages in a chunk is  2,147,483,647
(0x7fffffff).

Archiving a dbspace with a chunk of this size can use an
excessive amount of memory when starting the archive and there
is a reasonable chance it will fail with an error comparable to:

CDR 4026531841 byte memory allocation failed (Pool:arc_4667763
Thread:ontape).
Assert Warning: ISAM error:  An error has occurred during
archive back up.
IBM Informix Dynamic Server Version <version>
        Who: Session(4667763, user@host, 37903, 0xf0d4caf8)
        Thread(5315619, ontape, 1f56c9988, 19)
        File: rsarcutl.c Line: 115
Action: init_arcbu()/SCBMALLOC()
stack trace for pid 97815 written to DUMPDIR/af.200bc8f8
See Also: DUMPDIR/af.200bc8f8
ISAM error:  An error has occurred during archive back up.

With a stack:

afstack
afhandler
afwarn_interface
oops_error
init_archive
isopen_arcbu
sqisopen_arcbu
tbj_open_archive
sqmain
spawn_thread
th_init_initgls
startup

Local fix

  • Configure the instance to allow it to use up to an additional
4GB of memory for the archive.

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 11.70.xC9W2, 12.10.xC14 and 14.10.xC4.

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IT31807
    • 

  • 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
    2020-02-10
    • 

  • Closed date
    2020-03-04
    • 

  • Last modified date
    2020-09-01
    • 





    

  • 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"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"C10","Line of Business":[{"code":"LOB10","label":"Data and AI"}]}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            02 September 2020
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
Page Feedback