Re: Apache and PHP-FPM
- Date: Mon, 24 Sep 2018 18:27:43 +0200 (CEST)
- From: Nazar Zhuk <firstname.lastname@example.org>
- Subject: Re: Apache and PHP-FPM
On Mon, Sep 24, 2018 at 05:52:28PM +0200, Martin LEUSCH wrote:
> I have a web server with Apache 2.4 running in worker mode and multiple php
> version with FPM service running in dynamic mode.
> Sometimes php-fpm stop responding and I got a 503 error on php request but
> apache still respond to http request to other files (css, js, jpeg, ...)
> then after a while apache stop respond (nothing logged on error log neither
> in access log). I have to restart apache and php-fpm services to unlock the
Did you check php-fpm log as well? It's /var/log/php7.0-fpm.log in
php-fpm package in stretch.
> Off course it's append while I have malicious activity on the server, the
> last time it's happen I found a SQL injection attempt that causing lot of
> php error (maybe an infinite loop).
I would consider what can be done to protect against these attacks in
the code. This could be the root cause of the issue.
> How can I avoid these kind of situation? Can I optimize actual settings?
> Should I use mpm_event with apache and/or ondemand process manager with
> mpm_worker config:
> StartServers 2
> MinSpareThreads 25
> MaxSpareThreads 75
> ThreadLimit 64
> ThreadsPerChild 25
> MaxRequestWorkers 150
> MaxConnectionsPerChild 0
> php-fpm pool config:
> pm = dynamic
> pm.max_children = 5
This could be a problem if you are getting spammed. Try increasing to
see if it slows down the appearence of timeouts, but see above
> pm.start_servers = 2
> pm.min_spare_servers = 1
> pm.max_spare_servers = 3