Re: ORA-07445, "SIGSEGV", & "address"???

man siginfo:

     SIGSEGV        SEGV_MAPERR          address not mapped to object
                    SEGV_ACCERR          invalid permissions  for  mapped
                                         object



     SIGBUS         BUS_ADRALN           invalid address alignment
                    BUS_ADRERR           non-existent physical address

HTH
Dimitre

• Original Message ----- From: "Schauss, Peter" <peter.schauss_at_ngc.com> To: <cmarquez_at_collegeboard.org>; <oracle-l_at_freelists.org> Sent: Thursday, May 19, 2005 9:54 PM Subject: RE: ORA-07445, "SIGSEGV", & "address"???

> Chris,
>
> This usually means that some piece of code committed a bounds violation,
> trying to read from or write to memory which it did not own.
>
> HTH,
>
> Peter Schauss
>
> -----Original Message-----
> From: oracle-l-bounce_at_freelists.org
> [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Marquez, Chris
> Sent: Thursday, May 19, 2005 11:39 AM
> To: oracle-l_at_freelists.org
> Subject: ORA-07445, "SIGSEGV", & "address"???
>
> All,
> I am about to open a TAR...painfully.
> Had a database (server?) crash a 2AM.
> Further sadness, the node/instance that crashed hung the other RAC
> node/instance...could not pull of the RAC reconfiguration...a whole
> other issue.
> One crash leads to another crash/hang :o|)
>
> I would like to get comments on the true meaning of "SIGBUS", "SIGSEGV",
> "...physical address", "...Address not mapped".
>
> I have always believed these to be Oracle/OS memory related issues?
>
>
> Thanks in advance,
>
> Chris Marquez
> Oracle DBA
>
>
> Errors in file /o01/app/oracle/admin/orcl/bdump/orcl2_j001_22478.trc:
> ORA-07445: exception encountered: core dump [kcbgtcr()+10562] [SIGBUS]
> [Non-existent physical address] [0x2C0AC00E] [] []
> Thu May 19 02:00:08 2005
> Errors in file /o01/app/oracle/admin/orcl/bdump/orcl2_diag_541.trc:
> ORA-07445: exception encountered: core dump [kghalf()+924] [SIGSEGV]
> [Address not mapped to object] [0x4001281] [] []
> Thu May 19 02:00:13 2005
>
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