BuddyPress.org

PHP Memory Limit is 128MB
Newest Versions at all (WP 3.0.1 and BP 1.2.6)
PHP 5.2.6
mysql 5.0.51a-24+lenny3

Its a root server with debian lenny.

if you want to look at the complete phpinfo, you can do this here: http://mein-deal.com/phpinfo.php

I think the problem is not the memory usage of php, but the usage of the mysql server.

Thanks a lot