[Gllug] Swap file size

[Vincent AE Scott]

Jackson, Harry(HJackson at colt-telecom.com)@Thu, Jan 31, 2002 at 05:08:13PM -0000:
> 
> 
> > -----Original Message-----
> > From: David Damerell [mailto:damerell at chiark.greenend.org.uk]
> > On Thursday, 31 Jan 2002, Jackson, Harry wrote:
> > [Sun]
> > >If the box dies how does it manage to dump this much stuff 
> > to swap or am I
> > >being silly. I can see it dumping some core files etc but 
> > Gb's of data take
> > >a while to drop to disk.
> > 
> > Two possibilities; the kernel may detect a problem that make
> > continuing impossible, but still be alive; and the boot PROM on Sun
> > kit is a hell of a lot smarter than a PC BIOS, and may be able to do
> > the job.
> 
> Do many people have that kind of recovery and investigation procedure out
> there or is it a case of get it back up and running afap. If speed is all
> important then dumping to swap may not be clever because as the system comes
> up it will start paging again. I am just interested in how the big systems
> are being managed.


speed probably is, but then again, so is future reliability.


> 
> Investigating a 4Gb dump could be a bit of a tw at t. Are there tools out there
> for looking through this sort of data. I know there are ones for dumps in
> the Linux kernel and I imagine there are ones for most other Commercial
> Unix's. When a dump is taken do you send it to the supplier and how do you
> know where to send it.

on solaris, theres adb, and crash.
next time your in a big bok shop, have a look for the book "Panic!" in
the sun section.  great book telling you how to start diagnosing crash
dumps.


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