slow Back Office

[Saraaa]

Hello, 

I have a prestashop 1.6.1.6 and lately my back office became really slow the only page that's not verry slow is Orders and I can't access the advanced parameters page when ever I try to acces i get the error HTTP ERROR 500. the sore is nnot affacted and it is working .

Any help ?!!!

[Saraaa]

thank you

i did turn the debug on and i'm getting this error 

Warning à la ligne 134 du fichier /home/clients/admin/web/classes/db/DbPDO.php
[2] PDO::query(): MySQL server has gone away

Warning à la ligne 134 du fichier /home/clients/admin/web/classes/db/DbPDO.php
[2] PDO::query(): Error reading result set's header

I did check the file but i still don't get what is the problem

 

 

 

 

Edited December 26, 2018 by Saraaa (see edit history)