How would I efficency change a datastore value across multiple servers every time it was changed?

So for one of my projects, I'm trying to make a game where every server is sharing the same resource pool. The main problem is that I can't find an effective or efficient way to change the value to an exact amount for every server.

E.G: There are currently 10 materials.

A player from server 1 deposits 3 materials.

There are now 13 materials in the 'resource pool' on every single server.

Now a player from server 2 takes out 4 materials.

There are now 9 materials on every server.

The main issue is that the players would be scattered across multiple servers, changing the value every time they deposit/withdraw the resource. I don't have any ideas on how I would constantly keep the value shared between every server - especially if multiple people are withdrawing and depositing at the same time.

What happened when I tested the game with multiple servers and players constantly withdrawing/depositing was that the server would be overloaded with requests and it would mess the values up between servers because they were constantly

As for any code samples -

local DataStore = game:GetService("DataStoreService"):GetDataStore("Armory")

game.Players.PlayerAdded:connect(function(player)
    local key = "play"
    DataStore:UpdateAsync(key, function(oldValue)
        local newValue = oldValue or 0
        newValue = newValue + 50
        game.Workspace.OutpostOmeet.OutpostData.Armory.Points.Value = newValue
        return newValue
    end)
end)

All this really does is adds a value to the datastore - then makes the armory points become the new value. I think the main problem with it is that if something else was being changed on another server - it wouldn't try and detect that, so it would be really clunky. Sending a request every X seconds would also feel pretty clunky.