try to debug

conf/php-fpm.conf

@@ -1,10 +1,11 @@
 ; Start a new pool named 'www'.
-; the variable $pool can we used in any directive and will be replaced by the
+; the variable $pool can be used in any directive and will be replaced by the
 ; pool name ('www' here)
 [__NAMETOCHANGE__]
 
 ; Per pool prefix
 ; It only applies on the following directives:
+; - 'access.log'
 ; - 'slowlog'
 ; - 'listen' (unixsocket)
 ; - 'chroot'
@@ -24,17 +25,19 @@ group = __USER__
 
 ; The address on which to accept FastCGI requests.
 ; Valid syntaxes are:
-;   'ip.add.re.ss:port'    - to listen on a TCP socket to a specific address on
+;   'ip.add.re.ss:port'    - to listen on a TCP socket to a specific IPv4 address on
 ;                            a specific port;
-;   'port'                 - to listen on a TCP socket to all addresses on a
-;                            specific port;
+;   '[ip:6:addr:ess]:port' - to listen on a TCP socket to a specific IPv6 address on
+;                            a specific port;
+;   'port'                 - to listen on a TCP socket to all addresses
+;                            (IPv6 and IPv4-mapped) on a specific port;
 ;   '/path/to/unix/socket' - to listen on a unix socket.
 ; Note: This value is mandatory.
-listen = /var/run/php7.2-fpm-__NAMETOCHANGE__.sock
+listen = /var/run/php/php__PHPVERSION__-fpm-__NAMETOCHANGE__.sock
 
-; Set listen(2) backlog. A value of '-1' means unlimited.
-; Default Value: 128 (-1 on FreeBSD and OpenBSD)
-;listen.backlog = 128
+; Set listen(2) backlog.
+; Default Value: 511 (-1 on FreeBSD and OpenBSD)
+;listen.backlog = 511
 
 ; Set permissions for unix socket, if one is used. In Linux, read/write
 ; permissions must be set in order to allow connections from a web server. Many
@@ -44,8 +47,13 @@ listen = /var/run/php7.2-fpm-__NAMETOCHANGE__.sock
 listen.owner = www-data
 listen.group = www-data
 ;listen.mode = 0660
+; When POSIX Access Control Lists are supported you can set them using
+; these options, value is a comma separated list of user/group names.
+; When set, listen.owner and listen.group are ignored
+;listen.acl_users =
+;listen.acl_groups =
 
-; List of ipv4 addresses of FastCGI clients which are allowed to connect.
+; List of addresses (IPv4/IPv6) of FastCGI clients which are allowed to connect.
 ; Equivalent to the FCGI_WEB_SERVER_ADDRS environment variable in the original
 ; PHP FCGI (5.2.2+). Makes sense only with a tcp listening socket. Each address
 ; must be separated by a comma. If this value is left blank, connections will be
@@ -59,7 +67,13 @@ listen.group = www-data
 ;       - The pool processes will inherit the master process priority
 ;         unless it specified otherwise
 ; Default Value: no set
-; priority = -19
+; process.priority = -19
+
+; Set the process dumpable flag (PR_SET_DUMPABLE prctl) even if the process user
+; or group is differrent than the master process user. It allows to create process
+; core dump and ptrace the process for the pool user.
+; Default Value: no
+; process.dumpable = yes
 
 ; Choose how the process manager will control the number of child processes.
 ; Possible Values:
@@ -122,7 +136,7 @@ pm.max_spare_servers = 3
 ; 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
+;pm.max_requests = 500
 
 ; The URI to view the FPM status page. If this value is not set, no URI will be
 ; recognized as a status page. It shows the following informations:
@@ -215,7 +229,7 @@ pm.max_requests = 500
 ;   last request memory:  0
 ;
 ; Note: There is a real-time FPM status monitoring sample web page available
-;       It's available in: ${prefix}/share/fpm/status.html
+;       It's available in: /usr/share/php/__PHPVERSION__/fpm/status.html
 ;
 ; Note: The value must start with a leading slash (/). The value can be
 ;       anything, but it may not be a good idea to use the .php extension or it
@@ -275,7 +289,7 @@ pm.max_requests = 500
 ;      - %{megabytes}M
 ;      - %{mega}M
 ;  %n: pool name
-;  %o: ouput header
+;  %o: output header
 ;      it must be associated with embraces to specify the name of the header:
 ;      - %{Content-Type}o
 ;      - %{X-Powered-By}o
@@ -291,9 +305,13 @@ pm.max_requests = 500
 ;  %t: server time the request was received
 ;      it can accept a strftime(3) format:
 ;      %d/%b/%Y:%H:%M:%S %z (default)
+;      The strftime(3) format must be encapsuled in a %{<strftime_format>}t tag
+;      e.g. for a ISO8601 formatted timestring, use: %{%Y-%m-%dT%H:%M:%S%z}t
 ;  %T: time the log has been written (the request has finished)
 ;      it can accept a strftime(3) format:
 ;      %d/%b/%Y:%H:%M:%S %z (default)
+;      The strftime(3) format must be encapsuled in a %{<strftime_format>}t tag
+;      e.g. for a ISO8601 formatted timestring, use: %{%Y-%m-%dT%H:%M:%S%z}t
 ;  %u: remote user
 ;
 ; Default: "%R - %u %t \"%m %r\" %s"
@@ -302,13 +320,13 @@ pm.max_requests = 500
 ; The log file for slow requests
 ; Default Value: not set
 ; Note: slowlog is mandatory if request_slowlog_timeout is set
-slowlog = /var/log/nginx/__NAMETOCHANGE__.slow.log
+;slowlog = log/$pool.log.slow
 
 ; The timeout for serving a single request after which a PHP backtrace will be
 ; dumped to the 'slowlog' file. A value of '0s' means 'off'.
 ; Available units: s(econds)(default), m(inutes), h(ours), or d(ays)
 ; Default Value: 0
-request_slowlog_timeout = 5s
+;request_slowlog_timeout = 0
 
 ; The timeout for serving a single request after which the worker process will
 ; be killed. This option should be used when the 'max_execution_time' ini option
@@ -347,15 +365,24 @@ chdir = __FINALPATH__
 ; Note: on highloaded environement, this can cause some delay in the page
 ; process time (several ms).
 ; Default Value: no
-catch_workers_output = yes
+;catch_workers_output = yes
+
+; Clear environment in FPM workers
+; Prevents arbitrary environment variables from reaching FPM worker processes
+; by clearing the environment in workers before env vars specified in this
+; pool configuration are added.
+; Setting to "no" will make all environment variables available to PHP code
+; via getenv(), $_ENV and $_SERVER.
+; Default Value: yes
+;clear_env = no
 
 ; Limits the extensions of the main script FPM will allow to parse. This can
 ; prevent configuration mistakes on the web server side. You should only limit
 ; FPM to .php extensions to prevent malicious users to use other extensions to
-; exectute php code.
+; execute php code.
 ; Note: set an empty value to allow all extensions.
 ; Default Value: .php
-;security.limit_extensions = .php .php3 .php4 .php5
+;security.limit_extensions = .php .php3 .php4 .php5 .php7
 
 ; Pass environment variables like LD_LIBRARY_PATH. All $VARIABLEs are taken from
 ; the current environment.
@@ -365,7 +392,7 @@ catch_workers_output = yes
 ;env[TMP] = /tmp
 ;env[TMPDIR] = /tmp
 ;env[TEMP] = /tmp
-
+env[PATH] = $PATH
 ; Additional php.ini defines, specific to this pool of workers. These settings
 ; overwrite the values previously defined in the php.ini. The directives are the
 ; same as the PHP SAPI:
@@ -390,3 +417,30 @@ catch_workers_output = yes
 ;php_admin_value[error_log] = /var/log/fpm-php.www.log
 ;php_admin_flag[log_errors] = on
 ;php_admin_value[memory_limit] = 32M
+
+; Common values to change to increase file upload limit
+; php_admin_value[upload_max_filesize] = 50M
+; php_admin_value[post_max_size] = 50M
+; php_admin_flag[mail.add_x_header] = Off
+
+; Other common parameters
+; php_admin_value[max_execution_time] = 600
+; php_admin_value[max_input_time] = 300
+; php_admin_value[memory_limit] = 256M
+; php_admin_flag[short_open_tag] = On
+
+; Additional php.ini defines, specific to this pool of workers.
+php_admin_value[memory_limit] = 512M
+php_value[upload_max_filesize] = 10G
+php_value[post_max_size] = 10G
+php_value[default_charset] = UTF-8
+; OPcache is already activated by default
+; php_value[opcache.enable]=1
+; The following parameters are nevertheless recommended for Nextcloud
+; see here: https://docs.nextcloud.com/server/15/admin_manual/installation/server_tuning.html#enable-php-opcache
+php_value[opcache.enable_cli]=1
+php_value[opcache.interned_strings_buffer]=8
+php_value[opcache.max_accelerated_files]=10000
+php_value[opcache.memory_consumption]=128
+php_value[opcache.save_comments]=1
+php_value[opcache.revalidate_freq]=1