svn switch: Possible Memory Leak

[Brian Buesker <bb...@qualcomm.com>]

I have a source tree which I checkout containing approximately 360 MB in 
about 240 K files. I access the repository through ra_dav (either HTTP 
or HTTPS). When I svn switch my working copy to another URL and watch 
the memory usage in top, I see it continuously growing. It does not stop 
growing until the switch completes, and the RSS eventually reaches above 
700 MB. I believe it is related more to the number of files in the 
working copy rather than the total size, as I tested the same sequence 
of steps with only a single file of the same size, and no leak was observed.

The repository is an FSFS repository, although it shouldn't matter as 
this problem is occurring on the client side.

Sequence of steps to reproduce:

1. Create a repository with many files in the trunk (ie. by importing a 
large open source project such as ACE, TAO, and CIAO 
(http://deuce.doc.wustl.edu/ACE+TAO+CIAO.tar.gz))
2. Create a tag from the trunk
3. Checkout from the trunk
4. Switch to the tag, watching the memory usage grow as displayed in top

Here is my environment:

OS: CentOS 3.1

SVN Version:
$ svn --version
svn, version 1.1.0 (Release Candidate 3)
  compiled Sep 27 2004, 09:12:49

Copyright (C) 2000-2004 CollabNet.
Subversion is open source software, see http://subversion.tigris.org/
This product includes software developed by CollabNet 
(http://www.Collab.Net/).

The following repository access (RA) modules are available:

* ra_dav : Module for accessing a repository via WebDAV (DeltaV) protocol.
 - handles 'http' schema
 - handles 'https' schema
* ra_local : Module for accessing a repository on local disk.
 - handles 'file' schema
* ra_svn : Module for accessing a repository using the svn network 
protocol.
 - handles 'svn' schema

Compiler:
$ gcc --version
gcc (GCC) 3.2.3 20030502 (Red Hat Linux 3.2.3-34)
Copyright (C) 2002 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Perl Version:
$ perl -v

This is perl, v5.8.5 built for i386-linux-thread-multi

Copyright 1987-2004, Larry Wall

Perl may be copied only under the terms of either the Artistic License 
or the
GNU General Public License, which may be found in the Perl 5 source kit.

Complete documentation for Perl, including FAQ lists, should be found on
this system using `man perl' or `perldoc perl'.  If you have access to the
Internet, point your browser at http://www.perl.com/, the Perl Home Page.

Berkeley DB Version: 4.2.52

Please let me know if there is any more information I can provide to 
help debug this problem.

Thanks,
Brian Buesker

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