Consider setting FCM priority to "high" for better delivery

[abrender]

I noticed that Instant Delivery is recommended for instant alerts because "Without instant delivery, messages may arrive with a significant delay".

A bit of snooping reveals that you can set the priority of a message to "high", which will "allow FCM to wake up a sleeping device when necessary". That functionality appears to be limited/bucketted but "if, in response to a high priority message, a notification is displayed in a way that is visible to the user, then your app standby bucket quota will not be consumed by that message".

[binwiederhier]

Thank you for the suggestion. I remember seeing it, but there was some comment about not misusing it, or otherwise there will be some penalty. I forgot, but I'll read up on it again.

[binwiederhier]

Ah yes it's right there

High priority messages generally should result in user interaction with your app or its notifications. If FCM detects a pattern in which they don't, your messages may be de-prioritized.

[binwiederhier]

if, in response to a high priority message, a notification is displayed in a way that is visible to the user, then your app standby bucket quota will not be consumed by that message

wait so do you think this means that if i display a notificaiton visible to the user, then the de-prioritization won't happen?

[binwiederhier]

I think it may be worth setting the FCM priority to high for ntfy priorities 4 and 5, but I think I may need to create a limiter to regulate how often it's used. I will have to do some more research.

[binwiederhier]

@abrender With the next server release, messages with priority 4+5 (high+max) will be FCM high priority messages