IBM Support

PH33226: DB2 BUFFER MANAGER OPEN PAGESET STORAGE LEAK

A fix is available

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • DB2 V12 Buffer Manager storage leak during pageset open
    processing by DSNB1OPP(UI68748) OFFSET46BA, with x'340' bytes
    of storage orphaned. From the Dump, many UTS PBG pagesets
    defined with MAXPARTITIONS = 1 were being opened by RUNSTATS and
    this resulted in Buffer Manager PB0X control block storage
    being leaked.
    Additional keywords: DB2STGLK/K
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All Db2 v12 for z/OS users.                                  *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * Memory leak occurs when acquiring                            *
    * storage for PB0X.                                            *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Apply corrective PTF when available                          *
    ****************************************************************
    The code to allocate storage for the PB0X failed to check
    if the dataset was non-partitioned. Thus, partitioned datasets
    would be allocated extra PB0X blocks, causing excess storage
    to be used up.
    

Problem conclusion

  • The logic was fixed to only allocate storage for the PB0X
    for the first piece of a non-partitioned dataset.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PH33226

  • Reported component name

    DB2 OS/390 & Z/

  • Reported component ID

    5740XYR00

  • Reported release

    C10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2021-01-11

  • Closed date

    2021-02-26

  • Last modified date

    2021-04-01

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

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

    010PC2Ÿ UI74173 010PC2Ÿ

Modules/Macros

  • DSNB1OPP
    

Fix information

  • Fixed component name

    DB2 OS/390 & Z/

  • Fixed component ID

    5740XYR00

Applicable component levels

  • RC10 PSY UI74173

       UP21/03/06 P F103 ¢

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

[{"Line of Business":{"code":"LOB10","label":"Data and AI"},"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEPEK","label":"Db2 for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"12.0"}]

Document Information

Modified date:
02 April 2021