我在ubuntu 9.10上安装了svn。但是,当我尝试使用svn签出开源项目的代码时,我收到此错误: $ svn co svn://svn.valgrind.org/valgrind/trunk valgrind svn: Berkeley DB error for filesystem '/home/svn/repos/valgrind/db' while opening 'nodes' table: Cannot allocate memory svn: bdb: Lock table is out of available locker entries 我需要采取哪些措施来修复它?