Re: [Xen-users] big sized applications in XEN virtual machine

["Fajar A. Nugraha" <fajar@xxxxxxxxxxxxx>]

Andre Kuester wrote:

> So I ask you, if there are any experiences
> with that. In special I ask myself, how the removal of the TLS libraries might
> affect performance and stability of those applications. 
> (Preferred OS is RHEL4)
>  
I tried using Oracle 10g on a rather old version of Xen from bk (it 
still uses kernel 2.6.9) with Lineox 4.
TLS libs (/lib/tls, /usr/lib/tls, /usr/X11r6/lib/tls) moved out of the way.
This configuration works great running MTA (mail filtering purposes) and 
web server (LAMP).
However it didn't work quite as expected running Oracle.
Oracle runs, but often I would get entries like these on alert log :

ORA-07445: exception encountered: core dump [kkogbro()+2832] [SIGSEGV] 
[Address not mapped to object] [0x0] [] []
ORA-00600: internal error code, arguments: [kghssgai2], [1], [36], [], 
[], [], [], []
ORA-00600: internal error code, arguments: [kghssgai2], [1], [20], [], 
[], [], [], []
ORA-07445: exception encountered: core dump [kkogbro()+2832] [SIGSEGV] 
[Address not mapped to object] [0x0] [] []
ORA-00600: internal error code, arguments: [kghssgai2], [5], [36], [], 
[], [], [], []
ORA-07445: exception encountered: core dump [kkogbro()+2832] [SIGSEGV] 
[Address not mapped to object] [0x0] [] []
ORA-07445: exception encountered: core dump [kkogbro()+2832] [SIGSEGV] 
[Address not mapped to object] [0x0] [] []
ORA-00600: internal error code, arguments: [kghssgai3], [128], [20], [], 
[], [], [], []
ORA-00600: internal error code, arguments: [kghssgai2], [5], [20], [], 
[], [], [], []
and sometimes it just dies.
Revert back to native linux, everything works fine.

I haven't had time to test current Xen 2.0.6 (or nightly snapshot) though.

Regards,

Fajar

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