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LI74515: DB2DART /DEMP WILL FAIL WHEN EXCESSIVE EXTENTS IN TABLESPACE

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • If a tablespace has many extents, like the case of a 2TB
    database with extent size of 2 (pagesize 16K),  db2dart /demp
    can give this output
    
    DAT extent anchor: 61256
    Traversing extent map for object type: 0
    Pool: 8, Object: 10689 EMP page class: 64,
    EMP pool page: 61256, # entries: 22
    Page LSN = 0F71 2196 CBE4
    Pool relative page #'s :
    61258 8510874 7761676 22479636 31539528
    38681348 42170384 49708944 58053836 62346196
    67549266 72538854 81950540 94038900 97659566
    110973532 112317730 112936274 115193574 120843188
    124144468 131180934
    FYI: Available (128) SMP buffer used for checking full in
    touchextent. No more checking was done. ix= 130
    
    
    The problem is that MAX_TOUCH in engn/dart/drtpool.C is defined
    too small
    

Local fix

Problem summary

  • If a tablespace has many extents, like the case of a 2TB
    
    database with extent size of 2 (pagesize 16K),  db2dart /demp
    can give this output
    
    DAT extent anchor: 61256
    Traversing extent map for object type: 0
    Pool: 8, Object: 10689 EMP page class: 64,
    EMP pool page: 61256, # entries: 22
    Page LSN = 0F71 2196 CBE4
    Pool relative page #'s :
    61258 8510874 7761676 22479636 31539528
    38681348 42170384 49708944 58053836 62346196
    67549266 72538854 81950540 94038900 97659566
    110973532 112317730 112936274 115193574 120843188
    124144468 131180934
    FYI: Available (128) SMP buffer used for checking full in
    touchextent. No more checking was done. ix= 130
    

Problem conclusion

  • Problem was first fixed in Version 9 Fix Pack 9
    

Temporary fix

Comments

APAR Information

  • APAR number

    LI74515

  • Reported component name

    DB2 UDE ESE LIN

  • Reported component ID

    5765F4104

  • Reported release

    910

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2009-05-21

  • Closed date

    2010-04-13

  • Last modified date

    2010-04-13

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

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

    LI74518 IC61609 IC65700

Fix information

  • Fixed component name

    DB2 UDE ESE LIN

  • Fixed component ID

    5765F4104

Applicable component levels

  • R810 PSN

       UP

  • R820 PSN

       UP

  • R910 PSN

       UP

  • R950 PSN

       UP

[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSEPGG","label":"DB2 for Linux- UNIX and Windows"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"910","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
17 October 2021