Recently, our Prod environment caused downtime due to some caching issue as reported by the agency that hosts our application. Sitecore support asked us to enable HTML Rendering Cache on select renderings (Header, footer, and navigation) because these are common in our pages. We enabled these in our staging environment by ticking
Vary By Data checkbox in Cache Section of rendering item.
Now, is there any way for us to see in logs or somewhere in Sitecore that enabling HTML cache rendering did something for performance? Because we want to see significant, positive results before doing this on our prod environment