Realm Sync - Long Initial Download Times

MongoDB Atlas App Services & Realm Atlas Device Sync
#1

I have a macOS app built with the Realm Swift SDK. The dataset is about 150mb and is running on an M2.

When a new user runs the app for the first time, the initial download of of the database takes FOREVER. It pushes 5 minutes, even on a 1000Mbps connection. Sync operations after the initial download are instant and perfect.

Restructuring/segmenting the database is not an option; the app requires all of the data that is being downloaded.

The initial-download performance is becoming untenable and I need advice on how to fix it. I found an old thread about compaction, here: MongoDB Realm syncing size - #13 by Brock_GL

It’s unclear if this advice is still relevant. Do I need to contact support to enable this, still? Or is the option now exposed in settings somewhere?

#2

Hi Bryan,
Would you be willing to share your app ID? This will allow us to take a closer look and possibly determine if this is due to cluster limitations, network, or something else.

#3

Sure. What’s the best way for me to get that to you in a non-public forum?

#4

I sent you a DM, we can coordinate there.