Differences

This shows you the differences between two versions of the page.

--- linux_server_manuals:apache_http_2_php-fpm [2018/09/07 14:25] – admin
+++ linux_server_manuals:apache_http_2_php-fpm [2021/08/18 14:46] (current) – ronney
@@ Line 11: / Line 11: @@
 <code>
 aptitude purge libapache2-mod-php
 </code>
@@ Line 21: / Line 22: @@
 a2dismod mpm_prefork
 a2enmod mpm_event
 </code>
@@ Line 27: / Line 29: @@
 <code>
 systemctl restart apache2
 </code>
 For further information, see [[https://wiki.apache.org/httpd/PHP-FPM|https://wiki.apache.org/httpd/PHP-FPM]] especially about ulimit and future issues if too many connection are opened. Take a look at the caveeats! Don't allow document upload into document root! Instead, let the application put uploads for example into /var/www/<appdir> .
+==== Increase pm.max_children ====
+PHP-fpm has a maximal amount of children processes which it uses to serve requests. The default setting of 5 most propably is too low for almost any kind of server. Check for similar messages in your log /var/log/php7.3-fpm.log<code>
+[05-Mar-2019 13:01:21] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 16 children, there are 3 idle, and 40 total children
+[05-Mar-2019 13:01:22] WARNING: [pool www] server reached pm.max_children setting (50), consider raising it
+</code>
+To change it edit /etc/php/7.3/fpm/. The following values are no recommendations in any way. I've just copied it from a server, with relatively low load. You have to consider the expected amount of requests, but also your server resources, especially the memory.
+<code>
+pm.max_children = 20
+pm.start_servers = 5
+pm.min_spare_servers = 1
+pm.max_spare_servers = 5
+</code>
+==== Increase PHP Execution Timeout ====
+If you use php scripts which run for a long time (>30s) then you need to change several settings, otherwise the script will timeout and the connection aborted.
+To increase the php max execution time, change following line in the file /etc/php/7.3/fpm/php.ini
+<code>
+#Max time you want a script to be able to be running
+max_execution_time = 300
+</code>
+That alone won't work, you will still get following error (or similar) if the script runs longer than 30 seconds:
+<code>
+[proxy_fcgi:error] [pid 11716:tid 140000557524736] (70007)The timeout specified has expired: [client 186.96.123.18:45986] AH01075: Error dispatching request to : (polling)
+</code>
+To avoid that, edit the file /etc/apache2/apache2.conf
+<code>
+# Timeout for proxy_fcgi module
+# This line needs to be added
+ProxyTimeout 300
+# That line already exists and is the general apache timeout.
+# If you want to increase the timeout over 300, you also need to change that line
+Timeout 300
+</code>
 ===== Enable HTTP/2 support =====
@@ Line 37: / Line 91: @@
 <code>
 a2enmod http2
 </code>
-Create file /etc/apache2/mods-enabled/http2.conf
+Create file /etc/apache2/mods-enabled/http2.conf (This is not necessary anymore with Debian 10 or newer)
 <file>
@@ Line 49: / Line 104: @@
         H2Direct on
 </IfModule>
 </file>
@@ Line 61: / Line 117: @@
     Require all granted
 </Directory>
 </code>