Red Hat LINUX ADVANCED SERVER 2.1 - Informations techniques télécharger pdf (Page 18)

Tips and Techniques: Install and Configure Oracle9i on Red Hat Linux

Advanced Server

send SIGKILL to everything including

init

change the console loglevel 0-9

Serial console and network based debugging become significant when the local

logging mechanisms, like klogd and syslogd fail. This could happen when there is a

device driver or filesystem problem which has affected the /var filesystem.

Serial Console

To debug using serial console, /etc/lilo.conf needs an entry, as listed below, in the

boot section. LILO is reconfigured for the new configuration to take effect.

append="console=ttyS0,115200 console=tty0"

The other requirement is, to establish a physical or network connection, from the

Linux system, to serial console (serial cable, terminal server etc..)

Oops, crash or hang output can be saved using serial console.

Netdump utility

Netdump is a network based debugging utility. The Netdump server and client are

installed by default, with the Advanced Server install option. The services are

enabled using

chkconfig <netdump_server/netdump> on

When a system crashes, the whole memory image is dumped on the Netdump

server. Because the memory image is the size of physical memory of the system, the

Netdump server needs lots of disk space to operate. A single Netdump server can

handle multiple clients.

There is another feature of this package, by which the user can use

netconsole

remotely log the debug / trace information, without using the space-consuming

dump of the memory image.

CONCLUSION

The features and the facilities present in the Red Hat Advanced Server

make it an Enterprise ready solution. The new features of the Red Hat

Advanced Server have been designed and integrated to work with

Oracle9i Database Release 2 database. Together, these solutions provide

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Red Hat LINUX ADVANCED SERVER 2.1 - Informations techniques Page 18