Branching a kernel-sized tree uses a lot of RAM

[Gerald (Jerry) Carter]

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Gerald (Jerry) Carter wrote:

> Funny.  I just got some complaints from one of our
> summer developers regarding merge.  I'm mirroring
> an svn tree using a simple shell script
> (http://people.samba.org/bzr/jerry/slag/scripts/bzr-svnmirror).
> The SAMBA_4_0 svn tree has about 9000 commits
> so the bzr mirror weighs in about 132M.  104M of that is
> in .bzr/.  SO in my case, the memory usage seems to
> related to a large history and not the source of the
> source.  But I'm still running some tests to reproduce
> original complaint.

Here's some followup information:

$ wget \
http://download.samba.org/samba/samba/ftp/bzr/SAMBA_4_0.bzr-svn-r16059.tar.bz2

The master URL is http://www.samba.org/~jerry/bzr/SAMBA_4_0.bzr

* "bzr pull" takes between 50 - 60M VSZ
* "bzr merge" takes around 40M

But create a new bzr repo and "bzr branch" and that topped
out at about 350M VSZ.  It spent most of the time around
283M.





cheers, jerry
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