Strange memory usage
Closed this issue · 1 comments
- I have looked for existing issues (including closed) about this
Bug Report
Version
axum v0.7.4
axum-core v0.4.3
Platform
Linux [..] 6.7.2-arch1-2 #1 SMP PREEMPT_DYNAMIC Wed, 31 Jan 2024 09:22:15 +0000 x86_64 GNU/Linux
Crates
axum = "0.7.4"
tokio = { version = "1.36.0", features = ["full"] }
Description
simplescreenrecorder-2024-02-07_03.49.11.webm
Greetings, everyone.
While testing axum, I noticed a strange feature: every time I ran wrk, the memory consumption increased. In the video above, each server outputs "Hello, World!". As you can see axum's memory consumption is increasing, while actix-web behaves quite predictably. I also tried adding an asynchronous wait to emulate an I/O operation, but this had no effect on memory consumption. At first I thought it looked like a memory leak, but I didn't jump to conclusions and continued testing. I noticed one detail: axum returns memory, but in my case it happened only after a few hours. I'm afraid that in production the application might crash with an OOM error.
My code:
use axum::{response::Html, routing::get, Router};
#[tokio::main]
async fn main() {
let app = Router::new().route("/", get(handler));
let listener = tokio::net::TcpListener::bind("127.0.0.1:3000")
.await
.unwrap();
println!("listening on {}", listener.local_addr().unwrap());
axum::serve(listener, app).await.unwrap();
}
async fn handler() -> Html<&'static str> {
// optional
tokio::time::sleep(std::time::Duration::from_millis(50)).await;
Html("<h1>Hello, World!</h1>")
}
Please let me know if I have made any errors in the design of the Bug Report.