Subject: Re: Swap overcommit (was Re: Replacement for grep(1) (part 2))
To: Matthew Dillon <>
From: Dominic Mitchell <>
List: tech-kern
Date: 07/16/1999 08:50:18
On Thu, Jul 15, 1999 at 09:57:31PM -0700, Matthew Dillon wrote:
>     Something is weird here.  If the solaris people are using a 
>     SWAPSIZE + REALMEM VM model, they have to allow the 
>     allocated + reserved space go +REALMEM bytes over available swap 
>     space.  If not they are using only a SWAPSIZE VM model.
>     Wait - does Solaris normally use swap files or swap partitions?
>     Or is it that weird /tmp filesystem stuff?  If it normally uses swap 
>     files and allows holes then that explains everything.

No, swap is slice based in Solaris.  tmpfs is just a filesystem (much
like MFS) which uses swap as backing store.  I will admit to never quite
understanding the relationship of how much swap tmpfs is willing to
steal though...  Maybe I should go and read the answerbook
( if you want a peek).
Dom Mitchell -- Palmer & Harvey McLane -- Unix Systems Administrator

	In Mountain View did Larry Wall
	    Sedately launch a quiet plea:
	That DOS, the ancient system, shall
	    On boxes pleasureless to all
	Run Perl though lack they C.
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