It depends on what your needs are. If you just have a lot of data that is coming in quickly but you aren't doing constant analysis on it, you can still use Post

It depends on what your needs are. If you just have a lot of data that is coming in quickly but you aren't doing constant analysis on it, you can still use Postgres. Switch to large batch writes for getting the data into the database to reduce the transaction overhead and look at using a Master-Slave replica setup. The 9.4/9.5 log replication features worked really well last time I used for them handling streaming data. We had a write master and a read slave and optimized accordingly. It worked pretty well once we got the log replication tuned accordingly.