Taking A Memory Dump In Linux; Failure Detection In Red Hat Enterprise Linux; Taking A Memory Dump In Red Hat Enterprise Linux; Taking A Memory Dump With Vmware - Hitachi Compute Blade 2500 Getting Started Manual

Taking a memory dump in Linux

This section describes how to take a memory dump in Linux.

Failure detection in Red Hat Enterprise Linux

The standard settings of Red Hat Enterprise Linux prevent the OS from
stopping even if an NMI occurs. Therefore, configure the settings of Red Hat
Enterprise Linux so that a kernel panic occurs when an NMI is issued. For
details, see Help or the documentation for the OS.
Note: In Red Hat Enterprise Linux, if "Function to stop the system
immediately when an MNI is received" is enabled, the CPU hang-up detection
functionality and kernel profile functionality cannot be used at the same time.

Taking a memory dump in Red Hat Enterprise Linux

To use the kdump memory dump functionality of Red Hat Enterprise Linux to
take a memory dump, perform the following procedure. If you use the
reliable memory dump functionality Linux Tough Dump, see the
documentation for Linux Tough Dump.
Triggers for taking a memory dump
When an OS failure (such as kernel panic) occurs, a memory dump is taken
automatically. Also, when the system is hung up, the management module
issues an MNI to take a memory dump.
While a memory dump is being taken
The progress is displayed on the screen as a percentage while a memory
dump is being taken. When the percentage reaches "100%", the memory
dump is complete. When the memory dump is complete, if the OS does not
restart automatically, restart it manually.
After a memory dump is taken
After the system is restarted, make sure that the memory dump was taken.
The output destination of the memory dump is /var/crash/date-time/
(initial setting
dump was taken.
#
If the output destination of the memory dump file has been changed from
the default setting, you can check it in the OS setting file /etc/
kdump.conf.

Taking a memory dump with VMware

This section describes the procedure to take a memory dump with VMware.
#
). date and time show the date and time when the memory
Taking a Memory Dump of the OS Running on a Server Blade
Hitachi Compute Blade 2500 Series Getting Started Guide
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