> On Sep 19, 2016, at 03:31, René J.V. Bertin <rjvber...@gmail.com> wrote:
> 
> On Monday September 19 2016 03:02:38 Jeremy Sequoia wrote:
> 
>> /var/tmp definitely isn't cleared though.
> 
> TMPDIR points into /var/folders.

Yes, and it looks like those do get cleared out on boot.

Note, however, that this particular case relates to the cache dir, not tmp (C, 
not T).

> Here's an example entry from macports's icon cache:
> 
> %> sudo afsctool -vvv 
> /var/folders/11/_bf842l54ngf42g66hkzslmw0000gp/C/com.apple.IconServices/FFB06CC518D1C57091BDD19F39A692B6.iscachebmp
>  
> /var/folders/11/_bf842l54ngf42g66hkzslmw0000gp/C/com.apple.IconServices/FFB06CC518D1C57091BDD19F39A692B6.iscachebmp:
> File is HFS+ compressed.
> File content type: dyn.age80w65dqfv0u3pcrz2a
> File size (uncompressed data fork; reported size by Mac OS 10.6+ Finder): 
> 4194304 bytes / 4.2 MB (megabytes) / 4 MiB (mebibytes)
> File size (compressed data fork - decmpfs xattr; reported size by Mac OS 
> 10.0-10.5 Finder): 112916 bytes / 115 KB (kilobytes) / 112 KiB (kibibytes)
> File size (compressed data fork): 112932 bytes / 115 KB (kilobytes) / 112 KiB 
> (kibibytes)
> Compression savings: 97.3%
> Number of extended attributes: 0
> Total size of extended attribute data: 0 bytes
> Approximate overhead of extended attributes: 536 bytes
> Approximate total file size (compressed data fork + EA + EA overhead + file 
> overhead): 115488 bytes / 115 KB (kilobytes) / 113 KiB (kibibytes)
> 
> There are a number of files of the same size, plus many smaller. I have no 
> idea how I can map this to an actual icon though.
> 
> 
>>> Even if keeping track of who's entitled to access which bits of cached icon 
>>> info the cache agent could prune the cache, removing everything that hasn't 
>>> been accessed for more than a reasonably long time.
>> 
>> Again, I think you are seeing something anomalous.  You should investigate 
>> before jumping to conclusions.
> 
> How large is your own icon cache directory? And asking here is me 
> investigating. I wouldn't really know where else to ask, Apple's 
> support/discussions forum? Doesn't seem like the most appropriate place to 
> discuss this kind of thing :)

6 MB for me.  1MB each for two others.

# du -scm /private/var/folders/*/*/*/com.apple.iconservices
6       
/private/var/folders/c1/7p4m5bx904392j49x1w2vyxh0000gn/C/com.apple.iconservices
1       
/private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/C/com.apple.iconservices
1       
/private/var/folders/zz/zyxvpxvq6csfxvn_n00000z000007r/C/com.apple.iconservices
6       total


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