How much memory do you need to run QuickBooks

Question: Had been using QuickBooks for a while now. The QuickBooks company file is too huge. I think this is what is causing my software and system to slow down. Searched the internet but could not find any solutions. QuickBooks is completely updated and my friend optimized the setting still the System is too slow. Do not know what else I can do. One of the most distressing situations for...