IBM Support

IT33390: MEMORY DURATION PROBLEM WITH UDR USED AGAINST IN CLAUSE

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APAR status

  • Closed as program error.

Error description

  • A query of the form
    
     select ...
       from <table>
      where some_udr(col_x) IN (<list_of_values>)
         or some_udr(col_y) IN (<list_of_values>)
         ...
    
    potentially and temporarily, for the duration of the query, will
    consume large amounts of memory, depending on how many rows hit,
    how many such in clauses and how long each <list_of_values>.
    More condtions for this problem are:
     - functional indices existing on  some_udr(col_X)
     - a query plan chosen that's making use of these indices
    (OPTCOMPIND 0 can be a favoring factor)
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Users of Informix Server prior to 12.10.xC15 and 14.10.xC5.  *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to Informix Server 12.10.xC15 (when available) or    *
    * 14.10.xC5.                                                   *
    ****************************************************************
    

Problem conclusion

  • Fixed in Informix Server 12.10.xC15 and 14.10.xC5.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT33390

  • 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

    2020-07-01

  • Closed date

    2020-12-07

  • Last modified date

    2020-12-07

  • 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":null,"label":null},"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:
08 December 2020