Suppose I had a website where each user could post the best song they heard that day and and make a comment. (Just as a silly example). Assume we expect expect 1000 users with unique user names. So, I might expect that there would be one record created possibly each day for each user. Would I just just save an individual record with the three fields and the database would gradually just grow that way. So after 365 days we could expect there would be 365,000 records. Suppose a user wants to see all of his records. It seems like the search has to look over all those records and all those user names. This seems really wasteful. What am I supposed to thinking about? Or maybe databases can just do this without any problem. I'm using postgresql and I'm just starting to think that soon the problem would get huge. With that size of data should I start to think about carefully organizing everything? Or is a typical database search so quick that I needn't even worry about a 'slow' search?