Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wasatch!cs.utexas.edu!uunet!brunix!sgf
From: sgf@brunix (Sam Fulcomer)
Newsgroups: comp.periphs
Subject: Re: Hard drive speeds
Summary: AMEND THAT LAST ARTICLE!!!
Message-ID: <13706@brunix.UUCP>
Date: 28 Aug 89 14:24:21 GMT
References: <17640@ut-emx.UUCP> <16567@pasteur.Berkeley.EDU> <6987@sdcsvax.UCSD.Edu> <1989Aug28.050055.28526@utzoo.uucp> <13700@brunix.UUCP>
Sender: news@brunix.UUCP
Reply-To: sgf@cfm.brown.edu (Sam Fulcomer)
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Organization: Brown University Center for Fluid Mechanics
Lines: 26

In article <13700@brunix.UUCP> sgf@cfm.brown.edu (Sam Fulcomer) writes:
>In article <1989Aug28.050055.28526@utzoo.uucp> henry@utzoo.uucp (Henry Spencer) writes:
>>In article <6987@sdcsvax.UCSD.Edu> jc%andataco.uucp@ucsd.edu (John Cornelius) writes:
>>>Swap devices should have the highest possible transfer rate since they're
>>>mostly sequential devices...
>>
>>Somebody's been reading old papers... Very few modern Unixes swap.  Paging
>
>Try running this shell script, called fubar, on your machine and tell me if
>it swaps:
>
>... text of painful shell script deleted...
>

The stupid news server wouldn't let me cancel the above, so...

>>DONT DO THIS UNLESS YOU'VE GOT YOUR OWN PERSONAL MACHINE<<

I posted before realizing that some people wouldn't know what the above
shell script would do.  It'll bring the system to a screeching halt. 
You probably won't even be able to tell if swapping's occurring (but it is...).
The reason (in BSD) that this is so painful is the brain-damaged way that
stuff is set up in param.c.

Sam
sgf@cfm.brown.edu fulcomer@jvncf.csc.org sgf%cfm@brownvm.bitnet