Select from x$ksmmem View Fails with ORA-07445 [qerfxGCol] Errors after Upgrading to 12c

(Doc ID 2161005.1)

Last updated on JULY 22, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.2 and later
Information in this document applies to any platform.

Symptoms

The alert log and the incident trace file report the following error:

ORA-07445: exception encountered: core dump [qerfxGCol()+2184] [SIGSEGV] [ADDR:0x7000000003D0900] [PC:0x105F51508] [Address not mapped to object]

The current sql in the trace file shows a simple Query involving x$ksmmem:

select * from x$ksmmem

The failing functions and the call stack in the trace file shows functions like:

... qerfxGCol  qerfxFetch  opifch2  kpoal8  opiodr  ttcpip  opitsk  opiino  opiodr  opidrv  sou2o  opimai_real  ssthrdmain  main  start ..... 

Changes

The database has been upgraded to 12c

Cause

Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms