Godot rust free#

To deal with DDoS, you essentially needs to make sure you have a strict uppderbound for all buffers in your server.

Godot rust free#

If you want to try this behaviour, just do some random large allocations in C/C++, then free it and check the task manager, the memory usage shouldn't change too much. Somewhat more importantly, it is really difficult to enforce freeing since the OS's memory allocator's actual behaviour is not under your control anyway, so even if you 'freed' your memory, it may still be held by the allocator, and is still equivalent to 'staying in use forever'. I think you don't need to be too worried about freeing memory back to OS if you keep memory usage largely constant, which is usually the goal for servers. jemalloc) may not return the page back to OS either. OS deals with memory in pages(4KiB(?) sized memory chunks), so even if OS wants to reclaim your memory, you need to clear an entire page first, and even then the memory allocator(e.g. If memory gets free’d from rust does it let the OS have that memory again? or does it stay in use forever, like with crystal-lang? you may get 1-2MB memory leak due to GC and memory fragmentation every now and then and that's okay). But since you're just using it for a game server, then you can tolerate a slight bit of randomess w.r.t memory use(e.g. If your server is for critical systems like flight controller on airplanes, then this is obviously not acceptable and you need something that doesn't exhibit dynamic memory behaviour at all. Obviously GC langauges cannot guarantee memory behaviour absolutely, so depending on the nature of your server, this may or may not be acceptable. So memory not getting freed to the OS is not a problem(since it will be reused later), but the total memory usage keeps growing endlessly is a problem(you've got a memory leak). Garbage collected langauges like Crystal, Elixir/Erlang leave memory management to the runtime, and the runtime handles reuses and so on. You don't get to call free directly in safe Rust, but even when you 'release' some heap memory in Rust, it wouldn't go back to OS immediately. in C/C++), and system usually reclaims your process's memory when it exits instead. Returning memory to OS is expensive, and even if you call system's free, the system may not reclaim it anyway(e.g. That isn't as big of a problem as you might think. Crystal-lang’s memory doesn’t get free’d to the OS