On Sat, Feb 22, 2014 at 4:14 PM, Duy Nguyen <pclo...@gmail.com> wrote: > On Sat, Feb 22, 2014 at 3:53 PM, David Kastrup <d...@gnu.org> wrote: >> David Kastrup <d...@gnu.org> writes: >> >>> Duy Nguyen <pclo...@gmail.com> writes: >>> >>>> OK with git://git.savannah.gnu.org/emacs.git we have >>>> >>>> - a 209MB pack with --aggressive >>>> - 1.3GB with --depth=50 >>>> - 1.3GB with --window=4000 --depth=32 >>>> - 1.3GB with --depth=20 >>>> - 821MB with --depth=250 for commits --before=2.years.ago, --depth=50 >>>> for the rest ... >>>> >>>> I'm not really happy with --depth=250 producing 209MB while >>>> --depth=250 --before=2.year.ago a 800MB pack. It looks wrong (or maybe >>>> I did something wrong) .... >> Another thing: did you really use --depth=250 here or did you use >> --aggressive? It may be that the latter also sets other options? > > I can't use --aggressive because I need to feed revisions directly to > pack-objects. --aggressive also sets --window=250. Thanks for > checking. My machine will have another workout session.
And 800MB is reduced to 177MB, containing history older than 2 years. The final pack is 199MB, within the size range of current --aggressive and should be reasonably fast on most operations. Again blame could still hit long delta chains but I think we should just unpack some trees/blobs when we hit long delta chains. I think we should update --aggressive to do it this way. So - gc.aggressiveDepth defaults to 50 (or 20?), this is used for recent history - gc.aggressiveDeepDepth defaults to 250 (or smaller??), used for ancient history - gc.aggressiveDeepOption is rev-list a rev-list option to define "ancient history", default to --before=2.years.ago. This option could be specified multiple times. Both packing phases use the same gc.aggressiveWindow. We could add gc.aggressiveDeepWindow too. GSoC project? -- Duy -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
