That's interesting info, although I'm not affected by this particular
issue.
Can you elaborate: should these caches be cleared on a reboot? Or do
they (normally) persist across reboots?
The OS/programs in question manage this; some are cleared on re-boot,
others persist until certain parameters cause them to be rebuilt. For
instance, on startup the system checks whether
/System/Library/Extensions is newer than the kernel extensions cache -
if so it re-builds it, otherwise it carries on.
OS X seems to do a huge amount of caching both in the Caches
directories and at a much lower level within the system (hotfiles and
the like).
Is clearing this cache a part of updating via Software Update ie
during the "optimization" process?
Any software updates that require caches to be expired would do so as
part of a post-flight script which would be handled by SoftwareUpdate
or the Installer. If you are using standard apple methods to install
you software you shouldn't have to worry about them.
I'm not entirely sure why John and I have run into this problem now as
both our radmind scripts take action which /should/ ensure the kernel
extensions cache is re-built when necessary. Presumably some other
cache (possibly in /System/Library/caches) has something to do with
it...
Infact, I just had a look in the 10.3.7 updater postflight-actions
folder and found this perl script:
<code>
#!/usr/bin/perl
my $target = $ARGV[2];
my $arch = `/usr/bin/arch`;
chomp($arch);
maybe adding this whole thing into a radmind script to be run when the
kexts are changed would help...
If leftover caches are an issue, it's something else to put on the
checklist when t/s...
Yes, it's a bit voodoo for my tastes as I don't thoroughly understand
what they all do but I find that clearing /Library/Caches and
/System/Library/Caches and ~/Library/Caches is often useful as a t/s
technique.
______________________________________
Geoff Lee <email@hidden>
Computing Support, Architecture
School of Arts, Culture and Environment
University of Edinburgh
20 Chambers St,
Edinburgh, Scotland,
EH1 1JZ
Tel: +44 (0)131 650 8020
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