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IT11351: ER DATASYNC THREAD LEAKS MEMORY IN CDRD POOL ON TARGET NODE WHENA SINGLE TRANSACTION DELETES LARGE NUMBER OF ROWS

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APAR status

  • Closed as program error.

Error description

  • When a single transaction deletes a large number of rows which
    have cascade deletes and triggers that execute UDRs, the target
    node seems to consume/leak huge amounts of memory in CDRD pool.
    On an informix instance setup with small SHMTOTAL such as 500mb
    the delete causes an Out of Memory situation.  The memory
    consumption can be seen by running "onstat -g mem" as shown
    below:
    
    IBM Informix Dynamic Server Version 12.10.UC5W1X3 -- On-Line --
    Up 01:35:19 -- 525620 Kbytes
    
    Pool Summary:
    name         class addr            totalsize    freesize
    #allocfrag #freefrag
    CDRD_1       V     48435028 384778240 71947352 1560302    55105
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All users                                                    *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Update to IBM Informix Server 12.10.xC6                      *
    ****************************************************************
    

Problem conclusion

  • Problem Fixed In IBM Informix Server 12.10.xC6
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT11351

  • 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

    2015-09-21

  • Closed date

    2015-12-30

  • Last modified date

    2024-09-24

  • 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":"BU059","label":"IBM Software w\/o TPS"},"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:
25 September 2024