Issue Plesk Panel too Slow

[Anoop]

Plesk Panel is too slow. Takes more than 10 minutes to load page. one month server traffic is below 30 GB. so please help me to fix it.

 

[IgorG]

Have you checked this KB article Plesk for Linux server is running slow : too much IO interactivity ?

 

[B_P]

@IgorG On my server, I can observe a similar behavior on some pages of the panel. Main issues are the overview pages of Subscriptions > [subscription name] when a subscription has more than just a few (sub)domains. Interestingly, changing the view does not change a lot.

 

[Bitpalast]

In some rare occasions we have observed that a restart of Plesk services on the machine is necessary. Maybe the issue can be resolved by running
# service psa stopall
wait until all are stopped, then
# service psa start
to restart. Don't go for the "restart" parameter. It should be the same, but from my experience at least it makes a difference in memory and process management to run the two commands instead of one if a service is suffering hickups.

 

[B_P]

In some rare occasions we have observed that a restart of Plesk services on the machine is necessary. Maybe the issue can be resolved by running
# service psa stopall
wait until all are stopped, then
# service psa start
to restart. Don't go for the "restart" parameter. It should be the same, but from my experience at least it makes a difference in memory and process management to run the two commands instead of one if a service is suffering hickups.

I think I once had success with restarting sw-engine. Just tried it with your approach but without success. What is interesting: Once the overview (in total 24 items consisting of domains and subdomains) has loaded, reloading works well.

 

[pleskpanel]

In many (not all) instances, it can be due to high I/O loads that have a detrimental effect on services. What is the result of a # top command?

 

[B_P]

In many (not all) instances, it can be due to high I/O loads that have a detrimental effect on services. What is the result of a # top command?

While the page (https://<serveraddress>/admin/subscription/overview/id/<subscription_id>) is loading, iotop shows a high usage % for "sw-engine-fpm: pool plesk".

 

[pleskpanel]

When you have high I/O activity in the disk subsystem, even small to medium tasks such as the Plesk SW engine will pop; Plesk itself isn't particularly a high load ecosystem so it might be worth looking at other services that may be affecting the I/O numbers.

 

[B_P]

Well, while there are some small tasks every now and then, the majority of time it look like this:

Total DISK READ :     245.77 K/s | Total DISK WRITE :      15.60 K/s
Actual DISK READ:     245.77 K/s | Actual DISK WRITE:      46.81 K/s
  TID  PRIO  USER     DISK READ  DISK WRITE  SWAPIN     IO>    COMMAND                                                 
28427 be/4 psaadm    245.77 K/s    0.00 B/s  0.00 % 99.99 % sw-engine-fpm: pool plesk
  556 be/3 root        0.00 B/s   15.60 K/s  0.00 %  9.36 % [jbd2/sda3-8]
25804 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.02 % [kworker/u4:2]
18432 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.00 % python2 /usr/bin/fail2ban-server -xf start
    1 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.00 % init
    2 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.00 % [kthreadd]
    3 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.00 % [ksoftirqd/0]

Just now I wanted to open a subscription with 5 domains and it took more than 2 minutes.