Do I have to paginate the data query?

I need to send email notifications to 5000 users every day from firebase functions.

My first approach is:

1. Make a query to firestore to get every user who must receive notification, making a .where() get.
2. Send emails using a third party service.

how would you tell if you have to paginate the data? What would be a good practice?

Edit

Each document has 50 words.

Thanks for your time.

CodePudding user response：

Depending on how large you configured your Cloud Functions instances to be, and how big your documents are, you may or may not need* to paginate the results.

I typically prefer not to depend on such magic number though, so when I have more than a few thousand documents to process, I tend to process them in pages of a couple of hundred documents at a time.