What should be done?

https://www.mongodb.com/docs/manual/reference/method/cursor.maxTimeMS/#mongodb-method-cursor.maxTimeMS

https://www.mongodb.com/docs/manual/reference/command/aggregate/#command-fields

When maxTimeMS is set on find and aggregate, any subsequent calls on cursor.Next() which triggers getMore uses the same maxTimeMS.

Where?

https://github.com/FerretDB/FerretDB/blob/main/internal/handlers/pg/msg_aggregate.go
https://github.com/FerretDB/FerretDB/blob/main/internal/handlers/pg/msg_find.go

Definition of Done

• all handlers updated;
• integration/compatibility tests added/updated;
• spot refactorings done;
• user documentation updated or an issue to create documentation created;