If you allocate more memory, programs will use it. Web browsers are notorious for abusing this, but it applies in lots of other places, including system cache.

If you allocate more memory, programs will use it. Web browsers are notorious for abusing this, but it applies in lots of other places, including system cache. In other words: if you allocate 1GB of RAM to a system and 256MB to another, the first will appear to use more RAM. You're reducing memory usage and performance at the same time. Whether you want that or not depends on what you want to run.