Windows Task Manager shows process memory keeps growing even though there are no memory leaks-Collection of common programming errors
Just because there is a growing amount of memory usage doesn’t mean it is necessarily ‘leaking’. You could simply be accumulating a large number of live objects and/or very large ones (containing lots and lots of data).
If you can provide more information about what language(s) you are using and what the application is doing I can perhaps help out with some more specific information!
UPDATE AS PER COMMENTS Well, you’ll just want to make sure the garbage collection is happening correctly. I’d suggest the libgc library to help with that perhaps. http://developers.sun.com/solaris/articles/libgc.html
The only other thing I could think of as being the cause of this is that you are maintaining references to the objects somewhere unintentionally so they are just piling up.