Due to 'high loading issues' on the server, my host (Hostgator) has had to intervene twice this month. In both cases they reported the problem script to be /wp-content/plugins/wordfence/wfscan.php
The first time they took my entire multisite installation offline but the second time they just disabled wfscan.php.
I don't want to stop using Wordfence but I may have to if this continues. Is there anything I can do to lighten the load on the server?