Do i need hardware requirements double if i go to use same database for both orion and NTA flow data

SolarWinds hardware recommendations are really hard to be 100% accurate they are only guidelines as YMMV. You need to factor in things such as what other modules you have in your environment. Is it just NPM and NTA or do you have other modules? What is your license tier (ie max capacity) vs your current monitoring capacity? What is your current FPS from NetFlow?

But at a basic level, the answer is yes, if you are going to bolt on additional modules to the base NPM then you should extend your system specs to accommodate that extra load. It doesn't always mean you need to double your hardware specs, but you should at least consider increasing them, or if your devices are virtual at least allow the ability to expand if/when required.

We have planned to implement NPM NCM and NTA in our environment and We have licence of SL500.. . May i know what the harware requirements and is i can use same database server for both NPM and NTA..?