Security plugins on your child site can help find security issues and help block specific users, but one thing to be aware of is security plugins which end up causing serious performance issues. One such security plugin is Cerber Security, which has been known to cause performance issues on sites. Ceber Security plugin will end up making a number of request to plugin files, as well as causing high CPU usage, due to the amount of PHP resources that it ends up using. When deactivated and uninstalled, the plugin will still leave behind a number of options and database tables.
Tips & Tricks