IBM Support

LI72977: DB2PGCLNR WILL LEAK QUEUE OF AIO.

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • db2pgclnr will open queue using io_queue_init when open file.
    However db2pgclnr does not remove queue while db2pgclnr has
    gone.
    Therefore AIO queue will be increase, if AIO queue exceed
    aio_max_nr, io_queue_init will return
    EAGAIN.
    EAGAIN will be occur when aio_nr > aio_max_nr.
    You will see the following messages in db2diag.log
    
    2007-12-17-23.26.11.572841+540 E30653G310         LEVEL: Error
    (OS)
    PID     : 23641                TID  : 3086718656  PROC :
    db2pclnr 0
    INSTANCE: db2inst1             NODE : 000
    FUNCTION: DB2 UDB, oper system services, sqloLioInit, probe:10
    CALLED  : OS, -, io_queue_init                    OSERR: EAGAIN
    (11)
    

Local fix

Problem summary

  • db2pgclnr will open queue using io_queue_init when open file.
    However db2pgclnr does not remove queue while db2pgclnr has
    gone.
    Therefore AIO queue will be increase, if AIO queue exceed
    aio_max_nr, io_queue_init will return
    EAGAIN.
    EAGAIN will be occur when aio_nr > aio_max_nr.
    You will see the following messages in db2diag.log
    
    2007-12-17-23.26.11.572841+540 E30653G310         LEVEL: Error
    (OS)
    PID     : 23641                TID  : 3086718656  PROC :
    db2pclnr 0
    INSTANCE: db2inst1             NODE : 000
    FUNCTION: DB2 UDB, oper system services, sqloLioInit, probe:10
    CALLED  : OS, -, io_queue_init                    OSERR: EAGAIN
    (11)
    

Problem conclusion

  • First fixed in DB2 UDB Version 9.5, FixPak 2
    

Temporary fix

Comments

APAR Information

  • APAR number

    LI72977

  • Reported component name

    DB2 UDE ESE LIN

  • Reported component ID

    5765F4104

  • Reported release

    950

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2008-01-08

  • Closed date

    2008-08-26

  • Last modified date

    2008-08-26

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

    LI72961

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

Fix information

  • Fixed component name

    DB2 UDE ESE LIN

  • Fixed component ID

    5765F4104

Applicable component levels

  • R950 PSN

       UP

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Document Information

Modified date:
26 August 2008