Should I allocate more RAM with 8gb RAM Minecraft?

Should I allocate more RAM with 8gb RAM Minecraft?

Naturally.

What else should use the RAM when you play?

Otherwise, Minecraft chugs around with only 1 GB of RAM.

If you prefer 4 GB, unless you play on an iGPU and you realize that it jerky o.

Then limit yourself to 3 (vlt 2) GB.

If you play normally without (or a few) mods or shaders, 1-2 GB is enough. But if you want to play mods, shaders or resource packs with high resolution, you should use best 4 GB.

A little more RAM does not hurt Minecraft. However, I would not assign too much, so 2 - 3 GB.