Starving QA/integration servers

A few hundred years ago, coal miners would die because of the build-up of methane and carbon monoxide in the mines. To give early warning of this situation, canaries were brought into the mines. Being more sensitive, the birds would faint first, giving the miners enough time to escape. Consider doing the same for your integration servers in your acceptance environment: deliberately starve them of resources. If they fall over, you will have enough time to review before watching the explosion in production.