diff --git a/data/helpers.d/php b/data/helpers.d/php
index 224c0a3d9..5e7a7ec78 100644
--- a/data/helpers.d/php
+++ b/data/helpers.d/php
@@ -2,18 +2,47 @@
 
 # Create a dedicated php-fpm config
 #
-# usage: ynh_add_fpm_config [--phpversion=7.X]
+# usage 1: ynh_add_fpm_config [--phpversion=7.X] [--use_template]
 # | arg: -v, --phpversion - Version of php to use.
+# | arg: -t, --use_template - Use this helper in template mode.
+#
+# -----------------------------------------------------------------------------
+#
+# usage 2: ynh_add_fpm_config [--phpversion=7.X] --usage=usage --footprint=footprint
+# | arg: -v, --phpversion - Version of php to use.#
+# | arg: -f, --footprint      - Memory footprint of the service (low/medium/high).
+# low    - Less than 20Mb of ram by pool.
+# medium - Between 20Mb and 40Mb of ram by pool.
+# high   - More than 40Mb of ram by pool.
+# Or specify exactly the footprint, the load of the service as Mb by pool instead of having a standard value.
+# To have this value, use the following command and stress the service.
+# watch -n0.5 ps -o user,cmd,%cpu,rss -u APP
+#
+# | arg: -u, --usage     - Expected usage of the service (low/medium/high).
+# low    - Personal usage, behind the sso.
+# medium - Low usage, few people or/and publicly accessible.
+# high   - High usage, frequently visited website.
 #
 # Requires YunoHost version 2.7.2 or higher.
 ynh_add_fpm_config () {
 	# Declare an array to define the options of this helper.
-	local legacy_args=v
-	declare -Ar args_array=( [v]=phpversion= )
+	local legacy_args=vtuf
+	declare -Ar args_array=( [v]=phpversion= [t]=use_template [u]=usage= [f]=footprint= )
 	local phpversion
+	local use_template
+	local usage
+	local footprint
 	# Manage arguments with getopts
 	ynh_handle_getopts_args "$@"
 
+	# The default behaviour is to use the template.
+	use_template="${use_template:-1}"
+	usage="${usage:-}"
+	footprint="${footprint:-}"
+	if [ -n "$usage" ] || [ -n "$footprint" ]; then
+		use_template=0
+	fi
+
 	# Configure PHP-FPM 7.0 by default
 	phpversion="${phpversion:-7.0}"
 
@@ -28,11 +57,65 @@ ynh_add_fpm_config () {
 	ynh_app_setting_set --app=$app --key=fpm_service --value="$fpm_service"
 	finalphpconf="$fpm_config_dir/pool.d/$app.conf"
 	ynh_backup_if_checksum_is_different --file="$finalphpconf"
-	cp ../conf/php-fpm.conf "$finalphpconf"
-	ynh_replace_string --match_string="__NAMETOCHANGE__" --replace_string="$app" --target_file="$finalphpconf"
-	ynh_replace_string --match_string="__FINALPATH__" --replace_string="$final_path" --target_file="$finalphpconf"
-	ynh_replace_string --match_string="__USER__" --replace_string="$app" --target_file="$finalphpconf"
-	ynh_replace_string --match_string="__PHPVERSION__" --replace_string="$phpversion" --target_file="$finalphpconf"
+
+	if [ $use_template -eq 1 ]
+	then
+        # Usage 1, use the template in ../conf/php-fpm.conf
+                cp ../conf/php-fpm.conf "$finalphpconf"
+                ynh_replace_string --match_string="__NAMETOCHANGE__" --replace_string="$app" --target_file="$finalphpconf"
+                ynh_replace_string --match_string="__FINALPATH__" --replace_string="$final_path" --target_file="$finalphpconf"
+                ynh_replace_string --match_string="__USER__" --replace_string="$app" --target_file="$finalphpconf"
+                ynh_replace_string --match_string="__PHPVERSION__" --replace_string="$phpversion" --target_file="$finalphpconf"
+
+	else
+        # Usage 2, generate a php-fpm config file with ynh_get_scalable_phpfpm
+                ynh_get_scalable_phpfpm --usage=$usage --footprint=$footprint
+
+                # Copy the default file
+                cp "$fpm_config_dir/pool.d/www.conf" "$finalphpconf"
+
+                # Replace standard variables into the default file
+                ynh_replace_string --match_string="^\[www\]" --replace_string="[$app]" --target_file="$finalphpconf"
+                ynh_replace_string --match_string=".*listen = .*" --replace_string="listen = /var/run/php/php$phpversion-fpm-$app.sock" --target_file="$finalphpconf"
+                ynh_replace_string --match_string="^user = .*" --replace_string="user = $app" --target_file="$finalphpconf"
+                ynh_replace_string --match_string="^group = .*" --replace_string="group = $app" --target_file="$finalphpconf"
+                ynh_replace_string --match_string=".*chdir = .*" --replace_string="chdir = $final_path" --target_file="$finalphpconf"
+
+                # Configure fpm children
+                ynh_replace_string --match_string=".*pm = .*" --replace_string="pm = $php_pm" --target_file="$finalphpconf"
+                ynh_replace_string --match_string=".*pm.max_children = .*" --replace_string="pm.max_children = $php_max_children" --target_file="$finalphpconf"
+                ynh_replace_string --match_string=".*pm.max_requests = .*" --replace_string="pm.max_requests = 500" --target_file="$finalphpconf"
+                ynh_replace_string --match_string=".*request_terminate_timeout = .*" --replace_string="request_terminate_timeout = 1d" --target_file="$finalphpconf"
+                if [ "$php_pm" = "dynamic" ]
+                then
+			ynh_replace_string --match_string=".*pm.start_servers = .*" --replace_string="pm.start_servers = $php_start_servers" --target_file="$finalphpconf"
+			ynh_replace_string --match_string=".*pm.min_spare_servers = .*" --replace_string="pm.min_spare_servers = $php_min_spare_servers" --target_file="$finalphpconf"
+			ynh_replace_string --match_string=".*pm.max_spare_servers = .*" --replace_string="pm.max_spare_servers = $php_max_spare_servers" --target_file="$finalphpconf"
+		elif [ "$php_pm" = "ondemand" ]
+		then
+			ynh_replace_string --match_string=".*pm.process_idle_timeout = .*" --replace_string="pm.process_idle_timeout = 10s" --target_file="$finalphpconf"
+		fi
+
+		# Comment unused parameters
+		if [ "$php_pm" != "dynamic" ]
+		then
+			ynh_replace_string --match_string=".*\(pm.start_servers = .*\)" --replace_string=";\1" --target_file="$finalphpconf"
+			ynh_replace_string --match_string=".*\(pm.min_spare_servers = .*\)" --replace_string=";\1" --target_file="$finalphpconf"
+			ynh_replace_string --match_string=".*\(pm.max_spare_servers = .*\)" --replace_string=";\1" --target_file="$finalphpconf"
+		fi
+		if [ "$php_pm" != "ondemand" ]
+		then
+			ynh_replace_string --match_string=".*\(pm.process_idle_timeout = .*\)" --replace_string=";\1" --target_file="$finalphpconf"
+		fi
+
+		# Concatene the extra config.
+		if [ -e ../conf/extra_php-fpm.conf ]; then
+			cat ../conf/extra_php-fpm.conf >> "$finalphpconf"
+		fi
+	fi
+
+
+	
 	chown root: "$finalphpconf"
 	ynh_store_file_checksum --file="$finalphpconf"
 
@@ -45,6 +128,7 @@ ynh_add_fpm_config () {
 		chown root: "$finalphpini"
 		ynh_store_file_checksum "$finalphpini"
 	fi
+
 	ynh_systemd_action --service_name=$fpm_service --action=reload
 }
 
@@ -145,3 +229,155 @@ ynh_remove_php () {
 		ynh_secure_remove /etc/php/ynh_app_version
 	fi
 }
+
+# Define the values to configure php-fpm
+#
+# usage: ynh_get_scalable_phpfpm --usage=usage --footprint=footprint [--print]
+# | arg: -f, --footprint      - Memory footprint of the service (low/medium/high).
+# low    - Less than 20Mb of ram by pool.
+# medium - Between 20Mb and 40Mb of ram by pool.
+# high   - More than 40Mb of ram by pool.
+# Or specify exactly the footprint, the load of the service as Mb by pool instead of having a standard value.
+# To have this value, use the following command and stress the service.
+# watch -n0.5 ps -o user,cmd,%cpu,rss -u APP
+#
+# | arg: -u, --usage     - Expected usage of the service (low/medium/high).
+# low    - Personal usage, behind the sso.
+# medium - Low usage, few people or/and publicly accessible.
+# high   - High usage, frequently visited website.
+#
+# | arg: -p, --print - Print the result
+#
+#
+# The footprint of the service will be used to defined the maximum footprint we can allow, which is half the maximum RAM.
+# So it will be used to defined 'pm.max_children'
+# A lower value for the footprint will allow more children for 'pm.max_children'. And so for
+#    'pm.start_servers', 'pm.min_spare_servers' and 'pm.max_spare_servers' which are defined from the
+#    value of 'pm.max_children'
+# NOTE: 'pm.max_children' can't exceed 4 times the number of processor's cores.
+#
+# The usage value will defined the way php will handle the children for the pool.
+# A value set as 'low' will set the process manager to 'ondemand'. Children will start only if the
+#   service is used, otherwise no child will stay alive. This config gives the lower footprint when the
+#   service is idle. But will use more proc since it has to start a child as soon it's used.
+# Set as 'medium', the process manager will be at dynamic. If the service is idle, a number of children
+#   equal to pm.min_spare_servers will stay alive. So the service can be quick to answer to any request.
+#   The number of children can grow if needed. The footprint can stay low if the service is idle, but
+#   not null. The impact on the proc is a little bit less than 'ondemand' as there's always a few
+#   children already available.
+# Set as 'high', the process manager will be set at 'static'. There will be always as many children as
+#   'pm.max_children', the footprint is important (but will be set as maximum a quarter of the maximum
+#   RAM) but the impact on the proc is lower. The service will be quick to answer as there's always many
+#   children ready to answer.
+ynh_get_scalable_phpfpm () {
+    local legacy_args=ufp
+    # Declare an array to define the options of this helper.
+    declare -Ar args_array=( [u]=usage= [f]=footprint= [p]=print )
+    local usage
+    local footprint
+    local print
+    # Manage arguments with getopts
+    ynh_handle_getopts_args "$@"
+    # Set all characters as lowercase
+    footprint=${footprint,,}
+    usage=${usage,,}
+    print=${print:-0}
+
+    if [ "$footprint" = "low" ]
+    then
+        footprint=20
+    elif [ "$footprint" = "medium" ]
+    then
+        footprint=35
+    elif [ "$footprint" = "high" ]
+    then
+        footprint=50
+    fi
+
+    # Define the way the process manager handle child processes.
+    if [ "$usage" = "low" ]
+    then
+        php_pm=ondemand
+    elif [ "$usage" = "medium" ]
+    then
+        php_pm=dynamic
+    elif [ "$usage" = "high" ]
+    then
+        php_pm=static
+    else
+        ynh_die --message="Does not recognize '$usage' as an usage value."
+    fi
+
+    # Get the total of RAM available, except swap.
+    local max_ram=$(ynh_check_ram --no_swap)
+
+    less0() {
+        # Do not allow value below 1
+        if [ $1 -le 0 ]
+        then
+            echo 1
+        else
+            echo $1
+        fi
+    }
+
+    # Define pm.max_children
+    # The value of pm.max_children is the total amount of ram divide by 2 and divide again by the footprint of a pool for this app.
+    # So if php-fpm start the maximum of children, it won't exceed half of the ram.
+    php_max_children=$(( $max_ram / 2 / $footprint ))
+    # If process manager is set as static, use half less children.
+    # Used as static, there's always as many children as the value of pm.max_children
+    if [ "$php_pm" = "static" ]
+    then
+        php_max_children=$(( $php_max_children / 2 ))
+    fi
+    php_max_children=$(less0 $php_max_children)
+
+    # To not overload the proc, limit the number of children to 4 times the number of cores.
+    local core_number=$(nproc)
+    local max_proc=$(( $core_number * 4 ))
+    if [ $php_max_children -gt $max_proc ]
+    then
+        php_max_children=$max_proc
+    fi
+
+    if [ "$php_pm" = "dynamic" ]
+    then
+        # Define pm.start_servers, pm.min_spare_servers and pm.max_spare_servers for a dynamic process manager
+        php_min_spare_servers=$(( $php_max_children / 8 ))
+        php_min_spare_servers=$(less0 $php_min_spare_servers)
+
+        php_max_spare_servers=$(( $php_max_children / 2 ))
+        php_max_spare_servers=$(less0 $php_max_spare_servers)
+
+        php_start_servers=$(( $php_min_spare_servers + ( $php_max_spare_servers - $php_min_spare_servers ) /2 ))
+        php_start_servers=$(less0 $php_start_servers)
+    else
+        php_min_spare_servers=0
+        php_max_spare_servers=0
+        php_start_servers=0
+    fi
+
+    if [ $print -eq 1 ]
+    then
+        ynh_debug --message="Footprint=${footprint}Mb by pool."
+        ynh_debug --message="Process manager=$php_pm"
+        ynh_debug --message="Max RAM=${max_ram}Mb"
+        if [ "$php_pm" != "static" ]; then
+            ynh_debug --message="\nMax estimated footprint=$(( $php_max_children * $footprint ))"
+            ynh_debug --message="Min estimated footprint=$(( $php_min_spare_servers * $footprint ))"
+        fi
+        if [ "$php_pm" = "dynamic" ]; then
+            ynh_debug --message="Estimated average footprint=$(( $php_max_spare_servers * $footprint ))"
+        elif [ "$php_pm" = "static" ]; then
+            ynh_debug --message="Estimated footprint=$(( $php_max_children * $footprint ))"
+        fi
+        ynh_debug --message="\nRaw php-fpm values:"
+        ynh_debug --message="pm.max_children = $php_max_children"
+        if [ "$php_pm" = "dynamic" ]; then
+            ynh_debug --message="pm.start_servers = $php_start_servers"
+            ynh_debug --message="pm.min_spare_servers = $php_min_spare_servers"
+            ynh_debug --message="pm.max_spare_servers = $php_max_spare_servers"
+        fi
+    fi
+}