ERROR message when choosing a product

[bibob]

Hello Sirs

I have a problem in my webshop.
I get an error message when I click on a product.

Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 24 bytes) in /mounted-storage/home122c/sub009/sc67672-MKDX/*****.com/classes/MySQL.php on line 96

I have added that on my .htaccess file php_value memory_limit 100M

and it worked, but it take too long time to load the page, so idont want to use that rule.
i need to repair something to let the products work normally without to have to add some changes, just repair them.

The probleme happened after while i have imported about 10.000 products and after i have modified them.
After i have changed some setting on each product i got that fatal error message.

I use Prestashop 1.3.7

Please help me solve this problem.

Thank you in advance.