Slow Backoffice On Category Update

[plamensl]

Category update is really slow at backoffice.

It takes 20 seconds average - but sometimes will fail or run for a minute.

 

I found out this : Hook::exec('actionCategoryUpdate', array('category' => $this));

at classess/Category.php to run for 10 seconds average.

 

At the bottom of the page Prestashop reports unreal timings :

PrestaShop™ 1.5.3.1

 

Load time: 0.218s

While the actual time is 13 seconds

 

Dedicated server 8G ram 4 core CPU .

High load on the CPU while waiting.

No slow queries on the database.

 

~1000 categories; 30 000 products.

 

Please help.