How to get around a memory leak without changing the config?

Question

PHP

I use symfony backing to receive a chain of letters from the mail, I write letters to the cache, when I receive a large chain of letters, a lack of memory begins, please tell me which way to dig, how to give all the letters without clogging the memory

Answer 1

If it's a Symfony messenger handler, use the --no-debug option when running from the console and set a limit on the number of messages per run, either by time or memory, and run it through supervisor.
If you use an entity manager in a loop in a handler, don't forget to periodically call clear() on it.