[Gllug] Swap file size

[Vincent AE Scott]

Jackson, Harry(HJackson at colt-telecom.com)@Thu, Jan 31, 2002 at 04:46:55PM -0000:
> 
> 
> > -----Original Message-----
> > From: Jim Cheetham [mailto:jim.gllug at gonzul.org]
> > 
> > Errm, but when a Sun box dies and dumps memory, doesn't it 
> > stream it all
> > into swap space?
> > So if you ever needed to do dump analysis to find out what 
> > your box was
> > doing when it went down, you'd need at least swap = ram ...
> 
> 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.
> 

i think on reboot, the PROM detects the kernel has panic'd and then if
told todo so, write the contents of physical ram to the swap device.

and yep, if you've turned on crash dump analysis it can take a while to
write all that memory out.  but with that data you, or more likely Sun
engineers, can work out what happened.

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