How can I increase envelope size more than 1mb? #3046

The 1MB limit on transactions is a hard limit and can not be changed.

Another thing that might affect you is that one transaction has a limit of 1000 spans per transaction. (In your case a database request is one span and because they all happen in one request to your endpoint end up in the same transaction)

This span limit can be changed like this:

sentry_sdk.init(
    dsn=...,
    _experiments={
        "max_spans": 2000,
    }

Another thing you could do is use a before_send hook to remove unimportant data from the event to make it smaller. See: https://docs.sentry.io/platforms/python/configuration/filtering/