Well, the subject suggests the question:
- Oracle has a good support, so has enterpriseDB
- Huge amount of data can be easily managed by Oracle, Specs of PostgreSql suggest the same
- Feature wise I’m not sure, but reading on internet about both the DBs result in a tie
I wonder now, why oracle is more popular.
Which DB should be considered (leave the license/money thing) for a website which should be scaleable and may have large number of active users (lets say 10,000 users online).
I’m not looking for anything like Cassandra, mongo DB etc…
Ask yourself these questions:
Who is going to support your website (and database)? There are enterprise db companies out there which can provide world wide support, documentation, consultants etc. It is not just Oracle, but it is very likely that it’s easier to find Oracle or MSSQL specialist in every country.
Now, if you are willing to have more challenge to find PostgreSQL specialists or you are willing to train your team for PostgreSQL, go for it! Today (2016) PostgreSQL is the most advanced open-source RDBM and is on-par for most deployments with commercial competition.
Are there required features that only one database system offers? You cannot use advanced features of both database platforms, so check what it is that your application really needs. For example, if you require specific replication, backups and other scenarios, you should read documentation for both platforms to make an educated choice. They both offer similar features, but its better to be prepared.
Big companies usually stick with one database platform. When they buy an Oracle license once (and employ DBAs and other specialists), they continue using that vendor. That’s the usual scenario, but I assume you’re free from such baggage.
Also in the modern IT era, another question is to consider. Do I really need RDBMS? Every insert/update/delete costs very much. When you define foreign keys and other constraints it costs even more. It’s like 1 to 10 operations when comparing MongoDB vs Oracle. On the other hand, RDBMS gives you more safety and data integrity. If you don’t need it (i.e. lost comment is not an issue for you) you could go for MongoDB and others. Beware that usually you want RDBM in 9 out of 10 cases tho!