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IT35888: RUNNING ONCHECK -CI AGAINST A FOREST OF TREES INDEX TAKES OUT A LOCK AGAINST EVERY DATA ROW (OR PAGE) OF THE TABLE

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APAR status

  • Closed as program error.

Error description

  • Running oncheck -cI against a Forest of Trees index takes out a
lock against every data ROW (or PAGE) of the table.

For very large tables this may lead to LOCK table exhaustion OR
an extreme number of locks.

This behaviour does not occur for a normal BTREE index.

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix Server prior to 12.10.xC15 and 14.10.xC7.  *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Informix Server 12.10.xC15 or 14.10.xC7 (when     *
* available).                                                  *
****************************************************************

    



Problem conclusion


    

  • Fixed in Informix Server 12.10.xC15 and 14.10.xC7.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IT35888
    • 

  • 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
    2021-02-12
    • 

  • Closed date
    2021-08-23
    • 

  • Last modified date
    2021-08-23
    • 





    

  • 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


    








      
              
                            

              

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

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            24 August 2021
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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