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LMON or LMS Process Crashes Instance With ORA-600 [kghstack_underflow_internal_2] (Doc ID 2003278.1)

Last updated on MAY 16, 2023

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 11.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
IBM AIX on POWER Systems (64-bit)


  1. The LMON or LMS process crash the instance with an error like:

    ORA-00600: internal error code, arguments: [kghstack_underflow_internal_2], [0x110A10838], [], [], [], [], [], [], [], [], [], []

    ORA-1092 : opitsk aborting process
    Instance terminated by LMS1, pid = 14024818

  2. Review of the generated tracefiles reveals a call stack similar to:

    ... kghstack_underflow_internal kghstack_free kccgrd kjxgrf_rr_read kjxgrDD_rr_read kjxgrimember kjxggpoll kjfmact kjfdact kjfcln ksbrdp ...
    - OR -
    ... kghstack_underflow_internal kghstack_free ktundo kturcrbackoutonechg ktrgcm ktrget3 ktrget2 kclgcr ...




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