Hi Team,
We are using Mongo Realm trigger and function, which doing aggregations on the fields of collection and then inserting calculated data to other collection, tigger is running every day at 12:00 AM.
Collection having 500 thousands of data in a single day, we are getting below logs while trigger gets excecute:
uncaught promise rejection: FunctionError: exceeded max async work queue size of 1000
Please see below is the screenshot:
Hi @Jaymin_Modi and welcome in the MongoDB Community 
!
I think the main problem here is that you reached the limit of 120s of execution time for a single function.
One solution would be to create smaller processing job (split the job into smaller pieces then map / reduce) or optimize the pipeline so it runs faster.
If everything is already optimized, another solution would be to upgrade to a bigger tier or increase the IOPS / RAM.
Cheers,
Maxime.
