Problem with ksycoca on windows
Ch.Ehrlicher at gmx.de
Fri Feb 15 11:03:33 GMT 2008
> Von: David Faure
> On Thursday 14 February 2008, Ralf Habacker wrote:
> > Christian Ehrlicher schrieb:
> > > Hi,
> > >
> > > I've a problem on windows - when ksycoca is running / the db is open,
> > > can't execute kbuildsycoca to update the db. The problem is that
> > > kbuildsycoca can't overwrite an open file on windows.
> > > There're two solutions
> > > - let kbuildsycoca create ksyscoca.new and rename the file when db is
> > > - open the file in a special mode so I can delete it also someone has
> > > open file handle on it. But for this I can't use QFile and I don't
> > > if it really works like it should.
> > >
> > Appended is a patch which loaded the ksycoca database complete into
> > memory and close the file, so that kbuildsycoca can update the file
> > without problems.
> Ouch. This defeats the whole point of a shared mmap'ed file: every process
> is going
> to load the entire set of desktop files and mimetypes+servicetypes in
> The memory consumption will be quite large.
> With a very small kde4 installation (not all modules etc.) ksycoca4 is 1.6
> MB here.
> 15 kde processes running (that's a very low estimate) => 24 MB.
> Oh well, if there's no other solution....
There will be another solution (with Qt4.4 and QSharedMemory) when qt-copy compiles fine on windows with our emerge scripts (not tested/verified yet). For now I would like to have this patch in ksycoca (maybe with a TODO or something similar)
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