

As more products and traffic are added to your growing Magento store, your resource requirements may grow as well. If you ever get the message that your store is out of memory, you can always increase this limit in your .htaccess file.
Edit the .htaccess file in your store’s root directory, and look for the following section:
############################################
## adjust memory limit
php_value memory_limit 128M
php_value max_execution_time 18000
############################################
All you need to do is change the php_value memory_limit 128 M line to php_value_memory_limit 512M.
Once this setting is in place, your Magento store should be able to accommodate your recent site growth!
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