Re: Terminal command to disable disk swapping in El Capitan

Subject	Re: Terminal command to disable disk swapping in El Capitan
Newsgroups	comp.sys.mac.system
References	(2 earlier) <87-dnfGS0LZvBibInZ2dnUU7-akAAAAA@giganews.com> <55bbe2a1$0$27260$2c56edd9@usenetrocket.com> <310720151724400777%nospam@nospam.invalid> <ncidnWpz39vsQiHInZ2dnUU7-QmdnZ2d@giganews.com> <55bcef11$0$59315$b1db1813$2411a48f@news.astraweb.com>
From	Alan Browne <alan.browne@freelunchvideotron.ca>
Date	2015-08-01 19:22 -0400
Message-ID	<0rKdnah3579TySDInZ2dnUU7-eednZ2d@giganews.com> (permalink)

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On 2015-08-01 12:08, JF Mezei wrote:
> On 15-08-01 11:02, Alan Browne wrote:
>
>> No.  Computers these days support memory sizes far beyond the usual
>> needs of most users.  VM was an economic necessity in the past
>> (commercial implementations date to the early 1960's) and is much less
>> so these days.
>
>
> Disagree. VM allows memory sharing between processes, mapping of memory
> to a file and plenty of other goodies used by many applications. It also
> allows memory protections since memory protection is usually in the page
> table.

I've run my iMac for a couple weeks w/o VM and there was no impact at 
all.  Likewise MemCompression.

> Not sure how you can turn off Virtual Memory on modern OS/computers, and

With a command line.

         sudo launchctl unload -w 
/System/Library/LaunchDaemons/com.apple.dynamic_pager.plist

("load" to re-enable)

Whether that will work in 10.11 ...

> am rather curious to see if turning off Virtual Memory also turns off a
> large part of the "SIP" protections.  (remember that a portion of SIP
> protects running apps from having their code modified, and this implies
> memory protection).

SIP, as I understand it, protects certain file locations, not memory.

>
>
> If you wish to disable swap files then so be it, but don't claim you are
> disabling virtual memory.

A good point in light of terms.  What is meant is "swapping".  However, 
once one removes paging then I don't think VM will work as a proper VM. 
  It may "map" addresses in some abstract manner, but those abstracted 
addresses will have to map back to existing physical memory.

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Terminal command to disable disk swapping in El Capitan John Albert <j.albert@snet.net> - 2015-07-31 11:26 -0400
  Re: Terminal command to disable disk swapping in El Capitan nospam <nospam@nospam.invalid> - 2015-07-31 11:47 -0400
    Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-07-31 12:01 -0400
      Re: Terminal command to disable disk swapping in El Capitan nospam <nospam@nospam.invalid> - 2015-07-31 12:07 -0400
        Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-07-31 12:36 -0400
          Re: Terminal command to disable disk swapping in El Capitan nospam <nospam@nospam.invalid> - 2015-07-31 12:46 -0400
            Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-07-31 13:45 -0400
              Re: Terminal command to disable disk swapping in El Capitan nospam <nospam@nospam.invalid> - 2015-07-31 14:06 -0400
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-01 10:35 -0400
          Re: Terminal command to disable disk swapping in El Capitan Jolly Roger <jollyroger@pobox.com> - 2015-07-31 20:52 +0000
            Re: Terminal command to disable disk swapping in El Capitan billy@MIX.COM - 2015-08-01 09:13 +0000
              Re: Terminal command to disable disk swapping in El Capitan Jolly Roger <jollyroger@pobox.com> - 2015-08-01 14:03 +0000
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-01 10:13 -0400
                Re: Terminal command to disable disk swapping in El Capitan Jolly Roger <jollyroger@pobox.com> - 2015-08-01 14:51 +0000
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-01 11:12 -0400
                Re: Terminal command to disable disk swapping in El Capitan Jolly Roger <jollyroger@pobox.com> - 2015-08-01 18:39 +0000
                Re: Terminal command to disable disk swapping in El Capitan dempson@actrix.gen.nz (David Empson) - 2015-08-02 10:45 +1200
                Re: Terminal command to disable disk swapping in El Capitan Jolly Roger <jollyroger@pobox.com> - 2015-08-02 06:31 +0000
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-01 19:23 -0400
                Re: Terminal command to disable disk swapping in El Capitan billy@MIX.COM - 2015-08-02 16:07 +0000
                Re: Terminal command to disable disk swapping in El Capitan Jolly Roger <jollyroger@pobox.com> - 2015-08-02 16:13 +0000
                Re: Terminal command to disable disk swapping in El Capitan nmassello@yahoo.com (Neill Massello) - 2015-08-02 20:40 -0600
                Re: Terminal command to disable disk swapping in El Capitan billy@MIX.COM - 2015-08-02 16:55 +0000
                Re: Terminal command to disable disk swapping in El Capitan Jolly Roger <jollyroger@pobox.com> - 2015-08-02 17:20 +0000
                Re: Terminal command to disable disk swapping in El Capitan JF Mezei <jfmezei.spamnot@vaxination.ca> - 2015-08-02 13:35 -0400
                Re: Terminal command to disable disk swapping in El Capitan Jolly Roger <jollyroger@pobox.com> - 2015-08-02 17:51 +0000
              Re: Terminal command to disable disk swapping in El Capitan nospam <nospam@nospam.invalid> - 2015-08-01 11:54 -0400
            Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-01 10:24 -0400
          Re: Terminal command to disable disk swapping in El Capitan nmassello@yahoo.com (Neill Massello) - 2015-08-02 08:28 -0600
            Re: Terminal command to disable disk swapping in El Capitan nospam <nospam@nospam.invalid> - 2015-08-02 10:40 -0400
              Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-02 10:48 -0400
                Re: Terminal command to disable disk swapping in El Capitan nospam <nospam@nospam.invalid> - 2015-08-02 10:56 -0400
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-02 11:00 -0400
                Re: Terminal command to disable disk swapping in El Capitan nospam <nospam@nospam.invalid> - 2015-08-02 11:02 -0400
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-02 11:31 -0400
                Re: Terminal command to disable disk swapping in El Capitan nospam <nospam@nospam.invalid> - 2015-08-02 11:40 -0400
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-02 12:00 -0400
                Re: Terminal command to disable disk swapping in El Capitan billy@MIX.COM - 2015-08-02 16:26 +0000
                Re: Terminal command to disable disk swapping in El Capitan Jolly Roger <jollyroger@pobox.com> - 2015-08-02 16:31 +0000
                Re: Terminal command to disable disk swapping in El Capitan billy@MIX.COM - 2015-08-02 17:13 +0000
                Re: Terminal command to disable disk swapping in El Capitan Jolly Roger <jollyroger@pobox.com> - 2015-08-02 17:27 +0000
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-02 20:47 -0400
            Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-02 10:40 -0400
              Re: Terminal command to disable disk swapping in El Capitan nospam <nospam@nospam.invalid> - 2015-08-02 10:47 -0400
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-02 10:53 -0400
                Re: Terminal command to disable disk swapping in El Capitan nospam <nospam@nospam.invalid> - 2015-08-02 10:56 -0400
              Re: Terminal command to disable disk swapping in El Capitan nmassello@yahoo.com (Neill Massello) - 2015-08-02 11:48 -0600
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-02 21:08 -0400
                Re: Terminal command to disable disk swapping in El Capitan Jolly Roger <jollyroger@pobox.com> - 2015-08-03 01:25 +0000
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-03 08:10 -0400
                Re: Terminal command to disable disk swapping in El Capitan Jolly Roger <jollyroger@pobox.com> - 2015-08-03 13:32 +0000
      Re: Terminal command to disable disk swapping in El Capitan John Albert <j.albert@snet.net> - 2015-07-31 17:04 -0400
        Re: Terminal command to disable disk swapping in El Capitan nospam <nospam@nospam.invalid> - 2015-07-31 17:24 -0400
          Re: Terminal command to disable disk swapping in El Capitan Don Bruder <dakidd@sonic.net> - 2015-07-31 15:30 -0700
            Re: Terminal command to disable disk swapping in El Capitan nospam <nospam@nospam.invalid> - 2015-07-31 18:36 -0400
              Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-01 11:08 -0400
                Re: Terminal command to disable disk swapping in El Capitan Tim Streater <timstreater@greenbee.net> - 2015-08-01 16:45 +0100
                Re: Terminal command to disable disk swapping in El Capitan nospam <nospam@nospam.invalid> - 2015-08-01 11:54 -0400
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-01 18:57 -0400
                Re: Terminal command to disable disk swapping in El Capitan nmassello@yahoo.com (Neill Massello) - 2015-08-02 07:45 -0600
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-02 10:09 -0400
                Re: Terminal command to disable disk swapping in El Capitan nmassello@yahoo.com (Neill Massello) - 2015-08-02 11:48 -0600
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-02 21:04 -0400
          Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-01 11:02 -0400
            Re: Terminal command to disable disk swapping in El Capitan JF Mezei <jfmezei.spamnot@vaxination.ca> - 2015-08-01 12:08 -0400
              Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-01 19:22 -0400
                Re: Terminal command to disable disk swapping in El Capitan JF Mezei <jfmezei.spamnot@vaxination.ca> - 2015-08-01 22:06 -0400
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-02 09:36 -0400
                Re: Terminal command to disable disk swapping in El Capitan JF Mezei <jfmezei.spamnot@vaxination.ca> - 2015-08-02 11:39 -0400
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-02 11:58 -0400
                Re: Terminal command to disable disk swapping in El Capitan JF Mezei <jfmezei.spamnot@vaxination.ca> - 2015-08-02 13:42 -0400
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-02 20:53 -0400
                Re: Terminal command to disable disk swapping in El Capitan JF Mezei <jfmezei.spamnot@vaxination.ca> - 2015-08-02 21:31 -0400
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-03 08:12 -0400
                Re: Terminal command to disable disk swapping in El Capitan JF Mezei <jfmezei.spamnot@vaxination.ca> - 2015-08-03 15:42 -0400
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-05 09:06 -0400
                Re: Terminal command to disable disk swapping in El Capitan Alan Baker <email@domain.com> - 2015-08-02 21:22 -0700
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-03 08:16 -0400
                Re: Terminal command to disable disk swapping in El Capitan Alan Baker <email@domain.com> - 2015-08-03 20:56 -0700
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-05 09:11 -0400
                Re: Terminal command to disable disk swapping in El Capitan JF Mezei <jfmezei.spamnot@vaxination.ca> - 2015-08-05 12:40 -0400
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-05 18:53 -0400
                Re: Terminal command to disable disk swapping in El Capitan JF Mezei <jfmezei.spamnot@vaxination.ca> - 2015-08-06 00:02 -0400
                Re: Terminal command to disable disk swapping in El Capitan Tim Streater <timstreater@greenbee.net> - 2015-08-06 16:25 +0100
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-06 11:25 -0400
                Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-06 11:33 -0400
              Re: Terminal command to disable disk swapping in El Capitan John Albert <j.albert@snet.net> - 2015-08-04 23:01 -0400
        Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-08-01 10:47 -0400
          Re: Terminal command to disable disk swapping in El Capitan billy@MIX.COM - 2015-08-02 16:02 +0000
            Re: Terminal command to disable disk swapping in El Capitan Warren Oates <warren.oates@gmail.com> - 2015-08-02 13:39 -0400
  Re: Terminal command to disable disk swapping in El Capitan Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-07-31 12:01 -0400

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