I didn't see the question before, but I have a couple of guesses.
Your question concerns two things. The first one is the configuration of your server. If the problem is in it (I'm not too good with server software/hardware, so please excuse my ignorance), maybe in it's configuration or something, then the question is indeed off-topic on SO.
The second point of view is to suspect your own application. In this variant, the question would of course be on topic, but I personally would vote to close it as not a real question (no offense!). Why? Well, because you didn't really provide much information about your application, so guessing about the reasons is like shooting in the dark.
Now, considering the above, let's take a look at the question itself. You say a couple of words about your application, then you describe the server's behavior in much more detail; you even include the dump which itself occupies more space than all the other text in your topic. I believe that those who voted to close your question simply thought that you are mainly asking about what's wrong with your server, not your application. Thus, they probably (I can't be sure of course, just guessing) thought the question belongs to http://serverfault.com/ rather than SO.