heavy duty sliding door hardware on the other side is not much of a security concern, so you do not even need a heavy lock. These doors are mostly serving purpose to look stylish while creating the air space and energy flow in the home. Therefore the sliding glass door is very aesthetically pleasing and to complement your home as long as it works.
Nevertheless, it is very noisy if the thief will have to break the glass to get to. However the probability of happening is so slim so it is advisable to focus strong and safe. The whole purpose of having a sliding door is that you can have a view of the outside and inside your property. Do not forget it is also easily opened and closed.
This will ensure that you have the best of both worlds in style and security. Almost everyone who owned or has a sliding glass door can relate to jamming experience, an error lock or no lock. People will tell you that it is not worth the time or money to replace the former key. Nevertheless, it is far better to buy or replace them with new ones, and to be honest.