Hi
When you use prestashop in longtime
You want to Optimization database to make your site run faster
Please follow my guide
- back-up database
login back-office
Advanced Parameters > Database > DB Backup
create new back-up
2. login php-myadmin
run follow command
TRUNCATE TABLE ps_connections;
TRUNCATE TABLE ps_connections_source;
TRUNCATE TABLE ps_connections_page;
TRUNCATE TABLE ps_log;
TRUNCATE TABLE ps_pagenotfound;
TRUNCATE TABLE ps_referrer;
TRUNCATE TABLE ps_referrer_shop;
TRUNCATE TABLE ps_referrer_cache;
TRUNCATE TABLE ps_statssearch;
TRUNCATE TABLE ps_mail;
TRUNCATE TABLE ps_smarty_cache;
TRUNCATE TABLE ps_smarty_last_flush;
TRUNCATE TABLE ps_smarty_lazy_cache;
DELETE FROM ps_search_index
WHERE id_product not in (select id_product from ps_product);
DELETE FROM ps_search_word
WHERE id_word not in (select id_word from ps_search_index);
OPTIMIZE TABLE ps_search_index;
OPTIMIZE TABLE ps_search_word;