Disabling Plugin/Hook System to save server load

I saw this on a vBulletin board... does this work? We are expecting a meltdown on Thursday and I am just trying to prepare in my bunker.

 

Do you have a lot of plugins or addon products installed? If so, then yes it would save server resources to turn them off. If you do not have a lot of plugins and products installed, the savings will be miniscule.

There are better ways to save server resources and reduce your load. The primary one is installing memcache and offloading your datastore to it as well as having it cache your PHP files. Second, would be to make sure that your MySQL Query Cache is sufficient to hold all the common queries. This reduces database resources. After this, you would disable resource heavy addons, chat and shoutboxes should be the first to go. Anything that dynamically loads pages every X seconds after that. Finally, turn off features you're not using and adjust the time between your scheduled tasks so they don't run as often. Also turning off resource heavy features like Who's Online and Currently Active users can save you some database access.