Warning: require_once(PEAR.php) [function.require-once]: failed to open stream: Too many open files in system in /usr/local/share/pear/DB.php on line 30

Fatal error: require_once() [function.require]: Failed opening required 'PEAR.php' (include_path='.:/usr/local/share/pear') in /usr/local/share/pear/DB.php on line 30