-K switch

Hello, I'm getting this error: Stack space overflow: current size 1048576 bytes. Use `+RTS -Ksize' to increase it. The application is compiled under ghc 6.2.1 I've increased it and everything works, but before I begin to look for the way to pass an environment variable to a cgi app on apache under windows... I'd like to ask whether the error means that the stack must be bigger, or that someone is doing a wrong recursion in the haskell code. After all, I'm just retrieving 40 records from a DB. It doesn't look a big amount, does it? Well, the records are not that little, but my experience on haskell still is :) Enrico