Symfony app with worker mode use clean process on every request

[IndraGunawan]

i experimented FrankenPHP worker and a Symfony app with a stateful service

i created a reproducer repo here https://github.com/IndraGunawan/test-dunglas-symfony-docker

I have a service that changes the property value on a method call https://github.com/IndraGunawan/test-dunglas-symfony-docker/blob/main/src/Services/Counter.php#L14-L17 and I call the method on a controller https://github.com/IndraGunawan/test-dunglas-symfony-docker/blob/main/src/Controller/HelloController.php#L19

1. Run docker compose up --build
2. Open http://localhost:8080/hello in your favorite web browser

when I open the link that calls HelloController the output is always

{"counter":3}

I do expect the counter to increase every time I visit the URL as worker mode boot once and keep the app in memory

then I tried to run in an iteration

for i in {1..50}; do echo -n "Iteration $i: "; curl http://localhost:8080/hello; echo ""; done

the counter will be changing on every 25th iteration

[IndraGunawan]

solved the question.

it because https://frankenphp.dev/docs/performance/#number-of-threads-and-workers
FrankenPHP starts 2 times more threads and workers (in worker mode) than the available numbers of CPU so it will use a clean process until all worker have received at least 1 request