Finding available memory without shell, how to use hasMemory() - Found word(s) list error in the Text body

[Andrew Kluthe]

He's referring to system RAM here.


On Thu, Feb 27, 2014 at 6:48 PM, Bob Sneidar <bobsneidar at iotecdigital.com>wrote:

> Gabriel, if you are saving to the boot volume and getting dow to 100MB,
> this is a very serious matter. You should *never* go below 10 gigs on a
> modern boot driveIf the volume is being used for a swap file, it's not as
> serious but will affect performance. Just a heads up.
>
> Bob
>
>
> On Feb 26, 2014, at 11:21 , Gabriel Johnson <gwjapp at gmail.com> wrote:
>
> > Thanks for the responses. Yes, we are saving a 100+ MB data file to disk,
> > and when the free memory gets to be under 100 MB, saving to a standard
> hard
> > drive (not SSD) sometimes ends up taking a very long time (in Mac OS X),
> > making it appear to the user that the program has locked up. We have
> > contemplated going about this a different way, but the quickest fix for
> us
> > at the moment is to catch low memory situations.
> >
> > Mark: Yes, we need to know the amount of free ram (without counting the
> > swap/inactive memory).
> >
> >
> > Gabe Johnson
> > gwjapp at gmail.com
> > 603-978-9881
> >
> >
> > On Sun, Feb 23, 2014 at 9:09 PM, Mark Wieder <mwieder at ahsoftware.net>
> wrote:
> >
> >> Gabriel-
> >>
> >> Thursday, February 20, 2014, 11:07:59 AM, you wrote:
> >>
> >>> Hey All,
> >>
> >>> I am working on a program where I need to know the amount of available
> >>> memory.
> >>
> >>> I'm running on OS X and hasMemory() appears to return true/false for
> the
> >>> same values regardless changes to free/available memory. Is there some
> >>> trick to getting hasMemory() to correspond with the actual available
> >>> memory? Is this possibly something that is being addressed in newer
> >>> versions of LiveCode?
> >>
> >> Ah, the curse of modern operating systems...
> >>
> >> What the hasMemory() function does is allocate and then free the
> >> specified amount of memory, and then returns a boolean telling whether
> >> it was successful. However, before doing that, it casts the desired
> >> amount as a uint4, which limits the amount to 2147483647. If you're
> >> trying to see if more than 2G of memory is available, that won't help.
> >> And because modern operating systems will very happily exchange chunks
> >> of memory out to swap files when necessary, it's unlikely that you'll
> >> see the malloc fail, and thus you should see a "true" return value.
> >>
> >> Are you doing something where you really need to see the actual free
> >> ram without the swap/inactive memory? The "available" term here is a
> >> bit ambiguous, and depends on your needs.
> >>
> >> --
> >> -Mark Wieder
> >> ahsoftware at gmail.com
> >>
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-- 
Regards,

Andrew Kluthe
andrew at ctech.me