Solved

Solaris core dump question

Posted on 2013-11-11
4
540 Views
Last Modified: 2013-11-26
When the server is in ok prompt we can panic the server using sync command. What is the point of getting that core dump? Oracle is asking to give core dump.
0
Comment
Question by:mokkan
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 40

Accepted Solution

by:
omarfarid earned 500 total points
ID: 39639279
crash dumps are memory dump of the machine at crash time. It contains info that support will use to identify why the crash happened. please see links below for how to manage crash dumps


http://docs.oracle.com/cd/E23824_01/html/821-1451/tscrashdumps-4.html#scrolltoc
http://docs.oracle.com/cd/E23824_01/html/821-1451/tscrashdumps-31.html
0
 

Author Comment

by:mokkan
ID: 39639517
When sever is down. How is it going to have information in memory?
0
 
LVL 40

Assisted Solution

by:omarfarid
omarfarid earned 500 total points
ID: 39639574
when system crashes or panic, it dumps the memory content to hard disk. Here some quoted description:

" When a panic occurs on a Solaris system, a message describing the error is usually echoed to the system console. The system will then attempt to write out the contents of the physical memory to a predetermined dump device, which is usually a dedicated disk partition, or the system swap partition. Once this is completed, the system is then rebooted.

Once the system begins rebooting, a startup script will call the savecore utility, if enabled. This command will perform a few tasks on the memory dump. First it will check to make sure that the crash dump corresponds to the running operating system. If the dump passes this test, savecore will then begin to copy the crash dump from the dedicated dump device to the directory /var/crash/`uname -n', or some other predetermined device. The dump is written out to two files, unix.n and vmcore.n, where n is an sequential integer identifying this particular crash. Finally, savecore logs a reboot using the LOG_AUTH syslog facility. "
0
 

Author Closing Comment

by:mokkan
ID: 39677885
Thank you very much guys.
0

Featured Post

Don't Cry: How Liquid Web is Ensuring Security

WannaCry is just the start. Read how Liquid Web is protecting itself and its customers against new threats.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I. Introduction There's an interesting discussion going on now in an Experts Exchange Group — Attachments with no extension (http://www.experts-exchange.com/discussions/210281/Attachments-with-no-extension.html). This reminded me of questions tha…
It’s 2016. Password authentication should be dead — or at least close to dying. But, unfortunately, it has not traversed Quagga stage yet. Using password authentication is like laundering hotel guest linens with a washboard — it’s Passé.
In a previous video, we went over how to export a DynamoDB table into Amazon S3.  In this video, we show how to load the export from S3 into a DynamoDB table.
How to Install VMware Tools in Red Hat Enterprise Linux 6.4 (RHEL 6.4) Step-by-Step Tutorial
Suggested Courses

626 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question