as soon as I click the search button of this plugin I find this error in my error logs:
[Wed Mar 07 12:30:42 2012] [warn] [client 184.108.40.206] mod_fcgid: stderr: PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 27477298 bytes) in /var/www/clients/client1/web3/web/wp-content/plugins/wpdbspringclean/grepSearch.php on line 13, referer: http://pacura.ru/wp-admin/options-general.php?page=wpdbspringclean/WPDBSpringClean.php
I think 128MB for PHP scripts is usually enough...
any hints as to how much memory this plugin needs to run with i.e. 50,100,150,200 plugins being installed (installed, not active)?