nusagates

I got this error from /var/log/php7.2-fpm.log

[17-Jul-2019 22:53:22] WARNING: [pool www] child 12562 exited on signal 15 (SIGTERM) after 504.894319 seconds from start
[17-Jul-2019 22:53:22] NOTICE: [pool www] child 14429 started
[17-Jul-2019 22:53:22] WARNING: [pool www] child 12756 exited on signal 15 (SIGTERM) after 461.852559 seconds from start
[17-Jul-2019 22:53:22] NOTICE: [pool www] child 14430 started
[17-Jul-2019 22:55:26] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 22:57:26] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 22:58:29] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:00:41] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:01:15] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:03:25] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:05:50] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:08:22] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:09:17] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:12:34] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:14:27] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:17:32] WARNING: [pool www] child 19294, script '/var/www/nusagates.com/wp-admin/post.php' (request: "POST /wp-admin/post.php") execution timed out (166.654762 sec), terminating
[17-Jul-2019 23:17:32] WARNING: [pool www] child 18833, script '/var/www/nusagates.com/wp-admin/admin-ajax.php' (request: "POST /wp-admin/admin-ajax.php") execution timed out (163.741289 sec), terminating
[17-Jul-2019 23:17:32] WARNING: [pool www] child 19294 exited on signal 15 (SIGTERM) after 199.182138 seconds from start
[17-Jul-2019 23:17:32] NOTICE: [pool www] child 21058 started
[17-Jul-2019 23:17:32] WARNING: [pool www] child 18833 exited on signal 15 (SIGTERM) after 299.285097 seconds from start
[17-Jul-2019 23:17:32] NOTICE: [pool www] child 21059 started
[17-Jul-2019 23:18:22] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:20:00] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:22:51] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:26:36] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:30:02] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:31:52] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:33:31] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:34:54] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:35:59] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:36:10] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:36:56] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:38:12] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:40:09] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:42:00] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:44:40] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[17-Jul-2019 23:44:53] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it

What is it means and what should i do? Is this couse my site got error 500 or 504?

I got this on nginx error log:

2019/07/17 23:21:05 [error] 21648#21648: *91 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 36.xxx.xx.254, server: nusagates.com, request: "POST /wp-admin/post.php HTTP/1.1", upstream: "fastcgi://unix:/var/run/php/php7.2-fpm.sock", host: "nusagates.com", referrer: "https://nusagates.com/wp-admin/post.php?post=xxxxx&action=edit&lang=id&classic-editor&classic-editor__forget"

I have to run service php7.2-fpm restart to make site back to life.

I dont know how the server log. But the error message i got is 500 or 504.

I am using Mariadb latest version, php7.2-fpm. could you please suggest me what to do to know what the cause of error?

I am facing same issue. I am using Page Cache, Minify defult, browser chacing, and using cloudflare as CDN.

Is there any addition info about this? I am really need this. I want to integrate my site nusagates.com with Google Bucket. I want to store all static files on my site on Google Bucket.