IBM Support

IT06476: DB2PD -ALLDBS -INST CAN LOOP CONTINUOUSLY ON SYSTEMS WITH VERY LARGE BUFFERPOOL CONFIGURATIONS

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APAR status

  • Closed as program error.

Error description

  • "db2pd -alldbs -inst" can loop displaying information like this:
    
    Instance db2inst1 uses 64 bits and DB2 code release SQL10053
    with level identifier 0604010E
    Informational tokens are DB2 v10.5.0.3, s140203, IP23551, Fix
    Pack 3.
    
    Operating System Information:
    
    OSName:   Linux
    NodeName: test.ibm.com
    Version:  2
    Release:  6
    Machine:  x86_64
    Distros:  Red Hat Enterprise Linux Server 6.2
    
    
    CPU Information:
    TotalCPU    OnlineCPU   ConfigCPU   Speed(MHz)  HMTDegree
    Cores/Socket
    40          20          40          2261        1           10
    
    
    Physical Memory and Swap (Megabytes):
    TotalMem    FreeMem     AvailMem    TotalSwap   FreeSwap
    1034132     947         n/a         409600      323023
    
    Virtual Memory (Megabytes):
    Total       Reserved    Available   Free
    1443732     n/a         n/a         323969
    
    Message Queue Information:
    MsgSeg      MsgMax      MsgMap      MsgMni      MsgTql
    MsgMnb      MsgSsz
    n/a         65536       65536       1034240     65536
    65536       16
    
    Shared Memory Information:
    ShmMax               ShmMin               ShmIds      ShmSeg
    
    1084365606912        1                    258560      258560
    
    
    Semaphore Information:
    SemMap      SemMni      SemMns      SemMnu      SemMsl
    SemOpm      SemUme      SemUsz      SemVmx      SemAem
    256000      258560      256000      256000      1175000     32
    n/a         20          32767       32767
    
    CPU Load Information:
    Short     Medium    Long
    61.140000 52.210000 30.560000
    
    CPU Usage Information (percent):
    Total     Usr       Sys       Wait      Idle
    100.00000 n/a        n/a        n/a        0.000000
    
    ....
    
    db2pd can also be seeing growing in virtual memory.
    
    This problem will only occur on environments with very large
    bufferpool configurations.
    
    Note:  db2pd -alldbs -inst is also issued by db2fodc -hang
    implicitly.
    

Local fix

  • Manually kill db2pd after the data has been collected.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * ALL                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to DB2 Version 10.5, Fix Pack 7                      *
    ****************************************************************
    

Problem conclusion

  • First fixed in DB2 Version 10.5, Fix Pack 7
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT06476

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    A50

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2015-01-13

  • Closed date

    2016-01-29

  • Last modified date

    2016-01-29

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

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

    IT06477 IT06478

Fix information

  • Fixed component name

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

  • RA50 PSN

       UP

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSEPGG","label":"DB2 for Linux, UNIX and Windows"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"10.5","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
29 January 2016