From: Eric Wong <normalperson@yhbt•net>
To: Hin-Tak Leung <htl10@users•sourceforge.net>
Cc: git@vger•kernel.org, Jakob Stoklund Olesen <stoklund@2pi•dk>,
Sam Vilain <sam@vilain•net>,
Steven Walter <stevenrwalter@gmail•com>,
Peter Baumann <waste.manager@gmx•de>,
Andrew Myrick <amyrick@apple•com>
Subject: Re: git svn's performance issue and strange pauses, and other thing
Date: Fri, 19 Sep 2014 08:25:29 +0000 [thread overview]
Message-ID: <20140919082529.GA32459@dcvr.yhbt.net> (raw)
In-Reply-To: <1411025993.80693.YahooMailBasic@web172304.mail.ir2.yahoo.com>
Hin-Tak Leung <htl10@users•sourceforge.net> wrote:
> (I am not on the list - please CC)
Done, it is standard practice for git :)
> Thanks for git-svn - I use it instead of subversion itself for many years now.
>
> Just thought I'd ask/report a few issues I noticed for some time
> now, of tracking development of a particular subversion-based
> development project. Broadly speaking, I think there are 3 problems,
> especially noticeable against a particular repository, but
> to a lesser extent with some others too.
>
> - just doing "git svn fetch --all" seems to consume a lot of memory,
> for very little actual fetched changes. (in the 2GB+ region, sometimes).
>
> - "git svn fetch --all" also seems to take a long time too, for certain
> fetched changes. (in the minutes region).
Jakob sent some patches a few months ago which seem to address the
issue. Unfortunately we forgot about them :x
Can you take a look at the following two "mergeinfo-speedups"
in my repo? (git://bogomips.org/git-svn)
Jakob Stoklund Olesen (2):
git-svn: only look at the new parts of svn:mergeinfo
git-svn: only look at the root path for svn:mergeinfo
Also downloadable here:
http://bogomips.org/git-svn.git/patch?id=9b258e721b30785357535
http://bogomips.org/git-svn.git/patch?id=73409a2145e93b436d74a
Can you please give them a try?
> - I know I can probably just "read the source", but I'd like to know
> why .git/svn/.caches is even larger than .git/objects (which supposedly
> contains everything that's of interest)? I hope this can be documented
> towards the end of the man-page, for example, of important parts
> of .git/svn (and what not to do with them...), without needing to
> 'read the source'. Here is part of "du" from a couple of days ago:
>
> 254816 .git/objects
> 307056 .git/svn/.caches
> 332452 .git/svn
> 588064 .git
>
> The actual .git/config is here - this should be sufficient info for
> somebody looking into experiencing the issues I mentioned above.
IIRC, the caching is unique to mergeinfo, so perhaps Jakob's patches
help, there, too.
Sorry I don't understand the mergeinfo stuff more, I've never worked on
a project which uses it.
> --------
> $ more .git/config
> [core]
> repositoryformatversion = 0
> filemode = true
> bare = false
> logallrefupdates = true
> [svn-remote "svn"]
> url = https://svn.r-project.org/R
> fetch = trunk:refs/remotes/trunk
> branches = branches/*:refs/remotes/*
> tags = tags/*:refs/remotes/tags/*
> [pack]
> threads = 1
> ------------
next prev parent reply other threads:[~2014-09-19 8:25 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-18 7:39 git svn's performance issue and strange pauses, and other thing Hin-Tak Leung
2014-09-19 8:25 ` Eric Wong [this message]
2014-09-19 13:44 ` Jakob Stoklund Olesen
2014-10-05 1:02 ` Eric Wong
-- strict thread matches above, loose matches on Subject: below --
2014-10-06 23:51 Hin-Tak Leung
2014-10-07 18:20 Hin-Tak Leung
2014-10-19 4:12 ` Eric Wong
2014-10-19 14:41 ` Jakob Stoklund Olesen
2014-10-19 14:04 Hin-Tak Leung
2014-10-19 14:22 Hin-Tak Leung
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