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

From: Chris Gait <zhouyi235_at_gmail.com>
Date: Fri, 20 May 2005 09:09:37 -0400
Message-ID: <b6ffede1050520060974e079fe@mail.gmail.com>

By all means open a TAR, because core dumps are often from bugs in the Oracle code and there is next to nothing available to diagnose them outside Oracle's firewall. But don't neglect the other category of core dumps: Hardware.

Make sure your SA(s) run some memory diagnostics on the system.

Regards,
Chris Gait

On 5/19/05, Marquez, Chris <cmarquez_at_collegeboard.org> wrote:
> 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/i=
nstance...could not pull of the RAC reconfiguration...a whole other issue.
> One crash leads to another crash/hang :o|)
>=20
> I would like to get comments on the true meaning of "SIGBUS", "SIGSEGV", =
"...physical address", "...Address not mapped".

>=20

> I have always believed these to be Oracle/OS memory related issues?

>=20
>=20

> Thanks in advance,

>=20

> Chris Marquez
> Oracle DBA

>=20
>=20

> Errors in file /o01/app/oracle/admin/orcl/bdump/orcl2_j001_22478.trc:
> ORA-07445: exception encountered: core dump [kcbgtcr()+10562] [SIGBUS] [N=
on-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] [Add=
ress not mapped to object] [0x4001281] [] []
> Thu May 19 02:00:13 2005

>=20

> --
> http://www.freelists.org/webpage/oracle-l
>=20

--=20
Regards,
Chris Gait

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Received on Fri May 20 2005 - 10:40:24 CDT