Limit PHP-FPM to one execution on a time

Question

I would like to limit PHP-FPM to execute only once at a given time, which means any further request will be queued.

I'm using nginx but I think it's a matter of PHP-FPM configuration.

I read about PHP-FPM listen.backlog and process.max, it looked for me that process.max is what I need to tune but I wasn't sure..

What is the right way to achieve this?

I only use PHP for files processing, so it needs to be limited in order to protect the server from hige CPU usage — iTaMaR, May 19 '21 at 22:04
Then why are you running it via a webserver? This makes no sense. Use a message queue or a single threaded daemon or a batch process. — symcbean, May 19 '21 at 23:46
I'm running `nginx` and serve primarily static files, when needed I'm allowing users to upload their own files (not executable) via `PHP-FPM` — iTaMaR, May 20 '21 at 00:36
You can limit the number of requests per second/minute via nginx: https://www.nginx.com/blog/rate-limiting-nginx/ — abler98, May 20 '21 at 05:52
@abler98 I'm trying to avoid CPU usage not limiting the rate.. — iTaMaR, May 20 '21 at 11:47
I’m voting to close this question because it the XY problem — symcbean, May 20 '21 at 16:44
Why do you think it's wrong? I already have `nginx` for my web-server why sould I use something else? — iTaMaR, May 20 '21 at 16:58

score 1 · Answer 1 · answered May 19 '21 at 20:18

You're right. Just set these parameters:

pm = static
pm.max_children = 1

But maybe you need a locking mechanism? In this case you can try using some of this:

1 Answers1