queryable state and maintaining all time counts

[jelmer]

Hi,

I've been going through various talks on flink's support for queryable state. Like this talk by Jamie Grier at 2016's Flink forward :

https://www.youtube.com/watch?v=uuv-lnOrD0o

I see how you can easily use this to produce time series data. Eg calculate the number of events per hour. 

But I am wondering how one would go about using it for also maintaining all time counts. Eg count the number of events since the beginning of time. Is anybody doing this ? And if so what is your strategy ?