IBM Support

IT36583: CONNECTION SLOWNESS/HANG DUE TO MORE LATCH WAIT AT GROUP AUTHENTICATION STEP.

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APAR status

  • Closed as program error.

Error description

  • New connections experience slowness or hang waiting on operating
    system's group authentication.
    
    Many EDU stacks will look like:
    
    pthread_mutex_lock
    sqloxltc_app
    sqloGetGroupAttribById
    secGetGroups
    osplugin_get_groups
    get_groups_external
    getgroupsforuser
    sqlexGetGroupsForUser
    
    This APAR increases parallelism of group lookup calls made by
    DB2. It may alleviate or provide relief for slow group lookup
    caused by underlying authentication mechanism outside of DB2
    such as operating system, LDAP server, etc...
    

Local fix

  • Tune authentication stack (i.e. operating system, authentication
    server, etc...)
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All DB2 systems on all Linux, Unix and Windows platforms at  *
    * service level Version 11.5 GA.                               *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to DB2 Version 11.5.4 or higher                      *
    ****************************************************************
    

Problem conclusion

  • The complete fix for this problem first appears in DB2 Version
    11.5.4 and all the subsequent Fix Packs.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT36583

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    B50

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2021-04-14

  • Closed date

    2021-04-14

  • Last modified date

    2021-04-14

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

    IT31657

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

Fix information

  • Fixed component name

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

[{"Line of Business":{"code":"LOB10","label":"Data and AI"},"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":"11.5"}]

Document Information

Modified date:
15 April 2021