Not fully using server resource but site was slow when having traffic

Operating System & Version
Centos 7.8
cPanel & WHM Version
CENTOS 7.8 v90.0.14

Ryano

Registered
Oct 10, 2020
1
0
1
Malaysia
cPanel Access Level
Root Administrator
I have a laravel apps site that having alot of visitor recently and its become very slow and take too long to respond.

This system was like ads serving apps that will call image or code form other domain and serving images there. Example like them will call a script from my side and I will return them a HTML code or image file to their site.

And even i try with return empty value or empty page its also slow or take too long to respond.

But i check from my WHM or cpanel. Its still have alot of free resource and cpu/memory was just use 2% between.

Its not about bandwidth limit also, its got 8tb limit to go. and not about sql as well because its din't call anything from database. Only filesystem. like settings.txt.

This was my domain name ad-loupe.com. and I found out if I access without https:// example like : http://ad-loupe.com - This load fast https://ad-loupe.com - This load slow

and below was my top result.

Tasks: 444 total, 2 running, 442 sleeping, 0 stopped, 0 zombie
%Cpu0 : 3.0 us, 0.3 sy, 0.0 ni, 96.7 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu1 : 0.7 us, 0.0 sy, 0.0 ni, 99.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu2 : 4.7 us, 0.0 sy, 0.0 ni, 95.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu3 : 0.0 us, 0.3 sy, 0.0 ni, 99.7 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu4 : 0.0 us, 0.0 sy, 0.0 ni,100.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu5 : 7.0 us, 0.7 sy, 0.0 ni, 92.4 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu6 : 0.3 us, 0.0 sy, 0.0 ni, 99.7 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu7 : 0.0 us, 0.0 sy, 0.0 ni, 99.7 id, 0.3 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu8 : 0.0 us, 0.0 sy, 0.0 ni,100.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu9 : 2.0 us, 0.3 sy, 0.0 ni, 97.7 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu10 : 2.3 us, 0.0 sy, 0.0 ni, 97.7 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu11 : 2.3 us, 0.0 sy, 0.0 ni, 97.7 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu12 : 2.0 us, 0.3 sy, 0.0 ni, 97.7 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu13 : 2.3 us, 0.3 sy, 0.0 ni, 97.4 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu14 : 0.0 us, 0.0 sy, 0.0 ni, 99.7 id, 0.3 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu15 : 0.0 us, 0.0 sy, 0.0 ni,100.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 65701248 total, 61626280 free, 1981516 used, 2093452 buff/cache
KiB Swap: 1046520 total, 1046520 free, 0 used. 63131372 avail Mem

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
24398 adloupe 20 0 318788 21960 2908 S 2.7 0.0 0:01.61 php-fpm
22725 adloupe 20 0 318852 22536 3372 S 2.3 0.0 0:12.56 php-fpm
23111 adloupe 20 0 318852 22524 3348 S 2.3 0.0 0:13.52 php-fpm
24017 adloupe 20 0 318788 22056 2996 S 2.3 0.0 0:06.43 php-fpm
24335 adloupe 20 0 318788 22056 2996 S 2.3 0.0 0:02.80 php-fpm
24399 adloupe 20 0 318788 21964 2912 S 2.3 0.0 0:01.56 php-fpm
22699 adloupe 20 0 318852 22612 3432 S 2.0 0.0 0:13.66 php-fpm
23368 adloupe 20 0 318852 22532 3380 S 2.0 0.0 0:12.20 php-fpm

Please help me if needed any extra information can let me know.

Thank.
 

cPanelChris

Moderator
Staff member
Feb 16, 2020
38
4
8
Houston, TX
cPanel Access Level
Root Administrator
Hello @Ryano ,

This could be due to a limit being hit. Based on the output provided the site appears to be using PHP-FPM. If the max_children limit is being hit, requests will have to wait in line, thus causing a delay. I would recommend checking the PHP-FPM log for the version they are using. It will be located at the following where 73 is replaced with the PHP version (no period).

Code:
/opt/cpanel/ea-php73/root/var/log/php-fpm/error.log
If you see an error like the following, you'll want to increase the max_children for the site.

Code:
WARNING: [pool ad-loupe_com] server reached max_children setting (5), consider raising it
The article below covers how to update the max_children setting.

PHP-FPM Performance Tuning Basics

Let us know if this helps resolve the issue.