On Sun, Mar 08, 2015 at 12:39:10PM -0700, Linus Torvalds wrote: > On Sun, Mar 8, 2015 at 12:02 PM, Ken Moffat <zarniwhoop@xxxxxxxxxxxx> wrote: > > > > The comments on git bisect were for linus'skernel tree, on a local > > disk. 2.3GB of repo, just under 57000 files. > > Ugh. I hope you are talking about checked-out size. > > [torvalds@i7 linux]$ du -sh .git > 850M .git > > because otherwise it sounds like that repo hasn't been repacked in forever. > Yes - I had finished bisecting, with the build still present. > To really pack things (which can slow things down for old history as > people said, but on the whole it tends to be a big win due to less > IO), do > > git repack -adf --window=200 --depth=200 > > and go away for a while. Oh, and make sure your machine has enough > memory and CPU to make that "for a while" not be *too* long. > For that, many thanks - this desktop has about 7GB (integrated graphics steal a bit), current AMD desktop, and the repack of my scripts repo took about 56 seconds. I'll do that on my copy of the kernel tomorrow (it's on another machine). > You should have a few hundred files (just a few tens of files directly > after the repack) and that roughly 850MB of space for the repository > information itself. > > But yeah, fully checked out and built with all the modules etc, you > would have much more. > > That said, if you have something fairly that is consistently really > slow (like the "git commit" you mentioned), *before* doing the repack, > do > > strace -o ../trace-file -Ttt git commit > > and we can get a much better guess about why it's so slow. Send it to > me in private email if you don't want to make it public, and I can > take a look. I don't think you need to look - it was taking most of the time (about 8 seconds) looping through the many files below .git/objects. The trace was just over 9000 lines, repeating after the repack was less than 1300 lines. It's available (97K after using xz) if you think it would be useful, but I think you have already diagnosed the problem and solution. > > > ping between them gives times of 0.25 to 0.3 seconds > > .. and I *really* hope that was not seconds, but ms. Otherwise your > nfsv3 setup is going to be really really painful. > > Linus Yes, I'm not always good at knowing the right units. Thanks for the help. ĸen -- Nanny Ogg usually went to bed early. After all, she was an old lady. Sometimes she went to bed as early as 6 a.m. -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html