Bug#564137: cachefile srcpkgcache.bin is discarded without good reason
2010/2/1 Ben Hutchings <ben@decadent.org.uk>:
> So, srcpkgcache.bin is not involved (I don't know why David mentioned
> it) and pkgcache.bin is legitimately invalidated. But still, this is a
> problem, as apt-cache will be very slow until the binary cache is
> regenerated.
I mentioned the srcpkgcache.bin as i hoped with the included description
it would become clear that srcpkgcache.bin isn't what you seem to think
it is - but don't worry, you are not the only one, we have a bugreport for
it #566275 and while i find more and more users who seems to confuse
the meaning i still don't think it is of interest enough for the "normal" user
to be included in the manpage… Someone should write an extended guide. ;)
But again in medium-short:
> I've had this happen again, and I have an explanation. Installing a
> package directly with dpkg updates /var/lib/dpkg/status and this
> invalidates pkgcache.bin.
Is exactly why srcpkgcache.bin exists ~ to quote myself:
> srcpkgcache.bin - Cache of the /var/lib/apt/lists files
> pkgcache.bin - Cache of srcpkgcache.bin + status files
So after installing with dpkg directly (or after an install with apt) the
pkgcache.bin is invalid yes - BUT the srcpkgcache.bin is still
valid as it changes only on "apt-get update", so the srcpkgcache.bin
is reused and only the statusfile is parsed, which should happen
pretty fast as this file isn't that long compared to the Packages files in
/var/lib/apt/lists …
Best regards / Mit freundlichen Grüßen,
David Kalnischkies
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