O
n my non-SSD mini, before the change to SSD, I often had the experience
you mention.  Since then, no.  But likely the behavior is still the same,
just that the SSD manages it better.

Before SSD, I had to run "purge" in a terminal to get the memory back.
 I'll try starting lots of apps and see what happens on the new mini/SSD.

Would be nice if Apple, finally, learns to handle swap space better.  Maybe
Mountain Lion did so?

   -- Owen


On Fri, Jul 5, 2013 at 2:27 PM, Steve Smith <sasm...@swcp.com> wrote:

>  Owen ( and other OSX fanbois)  -
>
> I'm guessing that a few others here will be interested in the technical
> details of this topic...
>
> I did not become interested in OSXs memory management until about 6 months
> ago when my PBPro with 4G running 10.6.x started throwing me the rainbow
> frisbee of death (or at least tedium) often.   I began to look at the
> process table (via Activity Monitor) and noticed that **all** my
> applications seemed to be bloating up with memory... as if each and every
> one had memory leaks.
>
> Firefox, Thunderbird and Skype were the most notable.   I kind of assumed
> that the problem was a system library that they all shared, and aggravated
> by the fact that they were all naturally wanting/needing/using lots of
> their own internal cache (well, maybe not Tbird so much?)...  I also
> assumed that I had not updated my system properly (I tend to be pretty
> cavalier about keeping up with suggested updates, but trust the system (at
> large) to know what needs to be updated and not leave anything in the
> cracks)...
>
> I recently finally buried that machine after stripping it down to replace
> the charging port only to find afterwards that the problem was NOT that my
> battery was zeroed and my charge port too fried to take power... I finally
> gave up and blamed the easy/last-resort "logic board failure".   I give my
> machines a lot of abuse.   One of the SFX interns inherited the one my wife
> ran over in Iowa (shattered screen... he used it with an external monitor).
>
> Anyway...  back on topic.   The 15" 2010 MBP I bought to replace it had 8G
> and Mountain Lion installed.  I assumed (hoped futilely) that my problems
> would evaporate with a full (up to date) fresh system (10.8.4 install and
> max memory).   I didn't fret about it much but within a few days I started
> noticing (mostly because my previous machine had taught me to compulsively
> check the Memory Usage monitor) that I was operating on virtually 0 free
> memory as before.   The big difference was that I was not getting the
> whirling frisbee of death very often and nearly 1/2 of the memory is
> labeled "Inactive", though under the 4G 10.6 circumstance I also had
> significant "Inactive" memory available at all times...
>
> I am postulating (very tentatively) that this new machine/configuration is
> more efficient at reclaiming "Inactive Memory" just-in-time... perhaps
> because it has the quad-thread version of the duo core or perhaps 10.8
> fixed it up, or because my old system was just poorly configured (memory
> management libraries out of date?).
>
> One thing I am wondering is if others have had this problem (saturating
> physical memory and NOT getting efficient reclaiming of Inactive memory)?
> Or if others understand whether this is a real problem or just my lame
> understanding of how the memory management is supposed to work (I would
> sort of expect the Apps themselves to be managing memory more effectively
> than they seem to themselves, not just trusting the VM to keep them out of
> trouble?).
>
> - Steve
>
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