Loading Maps Into RAM

[henhouse]

I have a question, if you're running two servers, like one for testing something and then lets say a dev server.

If you run both servers using the same vmaps, maps, etc. Will they both load twice into RAM, or only once so that you can run two servers without overusing RAM?

[DasBlub]

they're different processes and they can't know that there's another instance running, so it's all loaded for each process.

[darkstalker]

maybe using a shared library that loads the maps could solve the problem

[fightingelf]

On Linux you could try KSM from kernel 2.6.32, but I guess it would need some recoding.

[XdK]

Shared memory seems to be a good way to do this but I think loading maps for each core instance doesn't use much memory.

[freghar]

Shared memory seems to be a good way to do this but I think loading maps for each core instance doesn't use much memory.

Actually, I'd bet they really do. Or is it really possible to waste 3GB of memory on .. 200 players?

Memory page sharing would work with shared libraries (thanks to correct alignment), KSM might be the solution here. I'm not sure how agressively the daemon looks for pages (had no chance to benchmark it), but it's worth a try at least.