Re: Something is broken in repack

> Junio C Hamano <gitster@pobox.com> writes:
>
> > Nicolas Pitre <nico@cam.org> writes:
> >
> >> On Fri, 7 Dec 2007, Jon Smirl wrote:
> >>
> >>> Starting with a 2GB pack of the same data my process size only grew to
> >>> 3GB with 2GB of mmaps.
> >>
> >> Which is quite reasonable, even if the same issue might still be there.
> >>
> >> So the problem seems to be related to the pack access code and not the
> >> repack code.  And it must have something to do with the number of deltas
> >> being replayed.  And because the repack is attempting delta compression
> >> roughly from newest to oldest, and because old objects are typically in
> >> a deeper delta chain, then this might explain the logarithmic slowdown.
> >>
> >> So something must be wrong with the delta cache in sha1_file.c somehow.
> >
> > I was reaching the same conclusion but haven't managed to spot anything
> > blatantly wrong in that area.  Will need to dig more.
>
> Does this problem have correlation with the use of threads?  Do you see
> the same bloat with or without THREADED_DELTA_SEARCH defined?
>