Improve PHP-FPM performance

Dockerfiles/base/data/php-fpm.d/pool.conf

@@ -1,7 +1,24 @@
 [www]
 
+# The number of child processes is set dynamically based on the following directives:
+# pm.max_children, pm.start_servers, pm.min_spare_servers, pm.max_spare_servers.
 pm = dynamic
-pm.max_children = 20
-pm.start_servers = 10
+
+# The maximum number of child processes to be created
+pm.max_children = 50
+
+# The number of child processes created on startup. Used only when pm is set to dynamic.
+# Default Value: min_spare_servers + (max_spare_servers - min_spare_servers) / 2.
+pm.start_servers = 5
+
+# The desired minimum number of idle server processes.
 pm.min_spare_servers = 5
-pm.max_spare_servers = 10
+
+# The desired maximum number of idle server processes.
+pm.max_spare_servers = 35
+
+# The number of requests each child process should execute before respawning.
+# This can be useful to work around memory leaks in 3rd party libraries.
+# For endless request processing specify '0'. Equivalent to PHP_FCGI_MAX_REQUESTS.
+# Default value: 0.
+pm.max_requests = 500