There are a lot of good suggestions here, but if this is the route you're going down and you are still using the same database, do everything you can to batch y

There are a lot of good suggestions here, but if this is the route you're going down and you are still using the same database, do everything you can to batch your inserts. In your queue consumer, aggregate as much as you can tolerate in memory, and then insert them all and commit the inserts in a single transaction. This eliminates a huge amount of MVCC overhead.