A grey zone on the chart means that QUANTA couldn’t retrieve the datas on this period or the data were null.
In the case above. Magento data are grey because via the cache system on this site, mostly Magento is not even called to create the HTML. This code is " memorised " in the cache system (type Varnish ) . Therefore, the graph shows a shaded area ; area for which the data were Magento Zero .
Note: It may happen that Quanta sensors are non-functional for several minutes. In order not to distort the analysis we delete the data. Therefore , it may happen that a gray bar appears on all your graphs . This is very rare.
Do not hesitate to contact us if you want to know more.