[PD] [Gem] pix-native? [RAM disk]

chris clepper cgclepper at gmail.com
Mon Jul 30 17:59:51 CEST 2007

There is always the possibility of paging RAM to disk at any point for any
bit of memory and this goes for something like pix_buffer or Pd's
table/array too.  Obviously, the machine needs to have not only the free
memory for the RAM disk but a comfortable amount of headroom.

The OSX memory manager won't always do the right thing, but one can try to
minimize its stupidity.  A lot of the kernel code is still based on
assumptions about ancient hardware and non-existent server scenarios, and it
certainly pays the price for it.

On 7/30/07, Max Neupert <abonnements at revolwear.com> wrote:
> hi,
> some sources suggest that there is no or little advantage to use a
> ramdisk in os x because the system caches data which has frequent
> access anyway.
> so a ramdisk can be counterproductive in a cenario where you have
> little ram:
> lets say you have one gig memory. 300 mb are used by some
> applications which are open, and another 300 by the system. now you
> have a video in your ramdisk of also 300. the system tries to cache
> it because it wants to accellerate but can't allocate enough anymore
> and data will be swaped on the harddisk..
> so you end up with less performance and more harddrive access because
> of the ramdisk..
> i'm curious about your findings.
> greetings, m.
> http://lowendmac.com/x-basics/02/0201.html
> http://www.kernelthread.com/forums/viewtopic.php?t=138
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