Subversion memory problem

Hi,

This might be a popular topic, but I couldn't find a solution
anywhere. Trying my chance here.

The system is a 2GB ram RHEL 5 32bit Linux. Recently built. Standard
installation plus Subversion. Some important packages:

subversion-1.6.3-0.1.el5.rf-i386
neon-0.25.5-10.el5-i386
httpd-2.2.3-22.el5_3.2-i386
mod_ssl-2.2.3-22.el5_3.2-i386
python-2.4.3-24.el5-i386
mod_python-3.2.8-3.1-i386

It's kind of irrelevant, but problem also exists on http/mod_svn, so
here is some related Apache config:

Related Apache config:
<IfModule prefork.c>
StartServers 10
MinSpareServers 10
MaxSpareServers 20
ServerLimit 200
MaxClients 200
MaxRequestsPerChild 500
MaxMemFree 128
</IfModule>

SVN config for Apache:

<Location /svn/mytest>
        DAV svn
        SVNPath /opt/app/svn/mytest
        SVNPathAuthz off
        SVNAllowBulkUpdates off
        AuthType Basic
        AuthName "mytest"
        AuthzSVNAccessFile /opt/app/svn/svn-acl.conf
        AuthUserFile /opt/app/svn/mytest.htpasswd
        Require valid-user
</Location>

Problem description:

Whenever I import a >200MB total size of files (thousands of them) to
a repository, the system won't release the cached memory when the
import is finished.

Example: Before import, cached memory is about 100M. I import Windows
2003 R2 installation CD contents using TortoiseSVN with
authentication, takes about 10 minutes, and a total of 600MB in size.
After import is finished, cached memory is at about 700MB, and it's
not released.

Here, I try to restart the Apache server. The cached memory is
SOMETIMES released. If restarting Apache doesn't release the cached
memory, removing the repository directory with rm -rf repodir does.
(interesting)

What I did so far in trying to fix the problem:

1) Played with the Apache prefork settings, didn't work.
2) Upgraded Subversion 1.6.2 to 1.6.3, didn't work
3) Added SVNPathAuthz and SVNAllowBulkUpdates, didn't work.
4) Changed SSLSessionCache from shmcb to shm, didn't work.
5) Was forcing SSL connection. Disabled it and used HTTP, didn't work.

These are all changes that affects remote users. None worked.

I finally tried checking out what I imported from Windows, to the same
repository server to some folder.

I used the svn command:

svn co file:///opt/app/svn/mytest somefolder

Before above command, cached mem was at 700MB (Because of the import
from Tortoise) When it's running cached mem grew up to 1.4GB, and it
wasn't released when the operation has finished until I removed the
checked out folder, using rm -rf somefolder

So it looks like, whatever the problem here is, is not related to
Apache or mod_dav_svn (web stuff) but maybe libsvn_fs or
libsvn_fs_base or util.

Has anybody had this problem before? I am open to all suggestions.

Thanks,
Murat

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Received on 2009-07-15 23:49:34 CEST