We have a website with a forum for the last 8 years. We have a constant flow of 20 tot 30 active users, two to five posts a day, and about one hunderd visitors a day. So it’s a small forum and it has been like that for years. Not much activity. Our website is the same as 2 years ago when we stopped working on it, only now with a few more posts. We like it the way it is.
In november 2014 we were migrated to an Ubuntu Server. Before that we experienced a lot of site problems like HTTP Error 500 Internal server errors and long loading times. After the migration the site went stable and fast. No problems anymore.
Since july/august the problems came back and it went worse. It’s almost like the time before the migration in 2014. Now with loading times up to 20 seconds.
Can someone tell me why this happens? Does Dreamhost have this problems with Shared Servers? Should we move to another hosting?