Just a question that has come up around Synthetic data in the CAS. In the Synthetic Backbone Pages report, there is a metric called Page Time Breakdown. I would assume that the sum of all the components (DNS Time, Connect Time, SSL Time, 1st Byte Time, and Content time) would all add up to 100%. I have run in to several instances of the Page Time Breakdown adding up to more than 100% (see screenshot).
Can anyone explain why this is? I have seen all of the different metrics (DNS Time, Connect Time, SSL Time, 1st Byte Time, and Content time) at one time or another equal more than 100% by itself.
Any explanation would be appreciated.
This has twisted many heads so you're in good company.
Basically there is two ways of accounting for time in there:
What you want to pursue with this last metric is f.ex. that if you have a gazillion objects, your "Connect Time" will take an proportionate lionshare since it will take time setting up the request for the object. If you have a large number of hosts, the DNS time (can be the bulk of the time. So the key is to monitor how the metrics there behave in relation to each other.