On Mar 16, 2010, at 5:24 PM, Joshua Paine wrote:
So, I had a fossil repo for a web app that has a lot of hands in it.
I'm
the only code developer (though not the first by many years--repo
converted from CVS), but the application serves hundreds of clients,
and
images and other such customizations for each client are done by
others.
The directory with these custom images etc. is large, so I left it out
of the repo initially. But now those others need to do a lot of work
replacing old graphics, so I added the images dir and subdirs so
there'd
be a safe place for them to get their old versions back and we
wouldn't
end up with dozens of files renamed to OLDfoo.bar.
Now that I've added these image dirs, fossil is inconceivably slow.
`fossil status` takes 45 sec on my dev machine, 4.5 minutes on the
server. Trivial commits take minutes.
The fossil repo is about 1GB.
Is this expected-ish behavior for a repo with many files at 1GB?
If I delete all these images from any branch I work with, will it get
fast again?
The problem is probably that Fossil is computing SHA1 checksums on all
the files in the check-out to see if they have changed. You can get
Fossil to use mtimes instead by doing:
fossil setting mtime-changes on
Mtime-changes is now the default, but I'm guessing you are using an
older version of Fossil. After you turn mtime-changes on, you have to
do a check-out before it takes full effect, I think, but after that
things should go faster.
Check-ins and check-outs will still be kind of slow in as much as
Fossil still computes MD5 checksums over everything in those cases.
See http://www.fossil-scm.org/fossil/doc/tip/www/selfcheck.wiki for an
explanation of why we do this expensive computation. If you find
things are still too slow, let me know. We can work together to
profile your runs and try to figure out what the inefficiency is and
fix it.
--
Joshua Paine
LetterBlock: Web applications built with joy
http://letterblock.com/
301-576-1920
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D. Richard Hipp
d...@hwaci.com
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