How to keep an app from "Dozing"?

[marcjw]

I wish to keep my Gmail app from Dozing so under Battery Optimization I configured it to not be optimized. That doesn't work. After an hour or so (maybe less) I am not alerted to any incoming emails (and Gmail doesn't sync) until I wake up the phone. Gmail works fine except when Dozing. Totally stock unrooted Android 6.0 on Tmo. Phone and all apps work great. I wonder if I need to configure any of the other system apps to not Doze in order to allow Gmail to not Doze?

Any ideas?

 

[simms22]

sure, write an app that doze, or ask the developer of that app not to let it doze. other than that, keep waking your phone up.