Droplet Performance after re-size

Over the last few days I have resized (memory and drive space due to changes in the pricing structure) three droplets on NYC3, I have noticed a decrease in performance with all three but more so with our main webserver.

2 droplets original size 2GB RAM 40GB HDD 2 vCPU’s changed to 4GB RAM 80GB HDD 2 vCPU’s. One is the webserver the other provides database services.

1 droplet original size 1GB RAM 30GB HDD 1 vCPU’s changed to2GB RAM 50GB HDD 1 vCPU’s. This is a development droplet.

Prior to the resize the website (solarpanelstore.com) when checked with GTmetric had an approximate load time around 3 seconds now it is closer to 6+ seconds, looking at the waterfall graph I notice that there is a considerable long wait time before anything happens (greater than 4 secs). Also CPU usage has gone up dramatically compared to before the resize.

With the other two droplets I have noticed an increase in disk latency.

I had expected after the resize to benefit from the increase in RAM but at the moment that is not the case in fact I have had a performance decrease.

Currently the configuration for each droplet is the same pre and post resize therefore I would expect at least a status quo. (I can produce DataDog graphics which illustrate the changes).

Wondering if I need to change data centers to get better performances. Any help appreciated.