IBM Support

IT28412: DB2 FAILS ON SOME AVX-512 CAPABLE CPUS

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You can track all active APARs for this component.

 

APAR status

  • Closed as fixed if next.

Error description

  • Db2 V11.1.4.4 utilizes the following Intel AVX-512 instructions
    extensions:
    AVX512DP,AVX512F,AVX512BW,AVX512CD,AVX512VL
    Not all Intel AVX-512 capable CPUs support all these extensions.
    Db2 currently only checks for AVX512F and AVX512CD.
    
    On Linux the supported instruction extensions can be verified
    using
    cat /proc/cpuinfo | grep flags
    

Local fix

  • db2set DB2_CPU_FEATURE_DISABLE=AVX512
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Db2 V11.1.4.4 users using certain Intel AVX512 CPUs.         *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to next release.                                     *
    ****************************************************************
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    IT28412

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    B10

  • Status

    CLOSED FIN

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2019-03-11

  • Closed date

    2020-01-18

  • Last modified date

    2020-01-18

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

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

Fix information

Applicable component levels

  • RB10 PSN

       UP

  • RB10 PSY

       UP

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEPGG","label":"Db2 for Linux, UNIX and Windows"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.1","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
18 January 2020