Redmine

Hello everyone and above all apologies for my English. Currently I have installed a machine with Centos is running in Redmine with SVN. Redmine is configured for LDAP authentication and creating users on the fly. Subversion authentication for LDAP also I have. I have about 20 projects in Redmine with many revisions each. Browsing the repository takes a while to load the first time, something I think is normal, but after going pretty fast. My problem comes when I try to access the repository through svn client or do a query like "svn co http:/......../" does not seem logical that a checkout of a project that weighs 4mb almost 40 minutes late. I'm a little desperate and dont know what else to look. I leave my scrpit / about to see if you can help a little. Thanks for your help:

Environment:
Redmine version 2.0.3.stable.10070
Ruby version 1.9.2 (x86_64-linux)
Rails version 3.2.6
Production Environment
Database adapter mysql2

Subversion version 1.6.11